Arcane Shield fix

Allow damage shields to merge

-This change was originally intended to fix a bug with Arcane Shield
(http://forums.te4.org/viewtopic.php?f=42&t=44895), but I ended up
creating an on_merge function for timed effect DAMAGE_SHIELD so now
anything that creates damage shields will intelligently overwrite an
existing shield.

-Will replace an existing damage shield entirely if both the shield
value and duration would be greater on the new shield.

-Will update the current shield value (but not max value) of an
existing shield if the new value would be greater. We keep the old
max value because the player may want to buff their shield with Aegis.

-If we updated an existing shield, we will refresh the current duration
based on the new shield's duration unless the duration has already been
refreshed 20 times. This checks the same property used by Weapon of
Light and Bathe in Light, which is why I allowed refreshing 20 times
instead of a smaller amount.

-Will never update or replace an existing shield if the
current duration is greater than the new shield's duration. We
can't know whether the player values shield value or duration more, and
updating the shield value of an existing damage shield with greater
duration would introduce power creep.

-Will never merge a reflection shield with a normal shield. For merging
two reflection shields, the lesser reflect value is used.

-Many shield sources (e.g., Shielding rune) are still disabled while
the player has a damage shield. This is fine because the player can
always cancel the current effect if they want to replace it. For
merging, we're mainly concerned about back-end sources like Arcane
Shield.

-EFF_DAMAGE_SHIELD and EFF_PSI_DAMAGE_SHIELD replace each other upon
activation (existing behavior). I may address that in a different
branch, but I need to investigate the consequences of changing it.

Others work incorporated

Little bit of astralInferno and Marson's code, again.

Merge branch 'MinimalistColors' of http://git.net-core.org/Hachem_Muche/t-engine4 into Hachem_Muche/t-engine4-MinimalistColors

Conflicts:
	game/modules/tome/data/resources.lua

Expose default resource shader params to the "UISet:Minimalist:Load" hook
Color priority is resource_definition.Minimalist.shader_params.color > Minimalist.shader_params[resource].color > resource_definition.color

-Will replace an existing damage shield entirely if both the shield
value and duration would be greater on the new shield.
-Will update the current shield value (but not max value) of an
existing shield if the new value would be greater. We keep the old
max value because the player may want to buff their shield with Aegis.
-If we updated an existing shield, we will refresh the duration to
3 turns unless the duration has already been refresh 20 times. This
checks the same property used by Weapon of Light and Bathe in Light,
which is why I allowed refreshing 20 times instead of a smaller amount.
-It's unlikely that an existing shield would be refreshed many times by
Arcane Shield, but I implemented this limitation to avoid refreshing
the same shield indefinitely. T think Aegis is the only talent that
benefits from refreshing an existing shield versus creating a new one,
so there shouldn't be any real abuse potential here.
-Note that this will never update or replace an existing shield if the
current duration is greater than Arcane Shield's default duration. We
can't know whether the player values shield value or duration more, and
updating the shield value of an existing damage shield with greater
duration would introduce power creep.

Merge branch 'CharacterSheetEnhancements' of http://git.net-core.org/Hachem_Muche/t-engine4 into Hachem_Muche/t-engine4-CharacterSheetEnhancements

don't try to curse items on the offchance that the tree is granted to some class on birth (thx astralInferno)

Others work incorporated

Ported some of Marson's old work about autoexplore. Is that ever a bad thing?

Log combat

This updates game.logMessage to allow for a nil target field, making logCombat easier to use.

Updated/added a few combat messages.

Standardized resources

* Standardizes Resource definitions.

This revises the way Actor resources are handled to allow them to be defined in one place (at tome.load), simplifying their definition, eliminating the need for most hooks to handle them, and making them easier for the AI to manage properly.
The corresponding MR for Orcs is at: http://git.net-core.org/tome/tome-orcs/merge_requests/6

Engine:
ActorResource:defineResource can now take a parameters field that merges additional information into the definition.
An extra check is added to prevent redefining an existing resource.
Defining a new resource now defines the string fields getFunction, getMinFunction, getMaxFunction, incFunction, incMinFunction, incMaxFunction to allow indirect reference to the correct resource functions from the definition.
Added support for an invert_values flag (resource increases when used), and sustain_prop and drain_prop fields for sustained talents.
This allows the module code to loop through all the defined fields/functions when checking for the corresponding properties in actor and talent tables.

ToME:
Hard coded resource references have been replaced with a loop checking all defined sustains for:
Actor:act (canceling sustains)
Actor:resetToFull (will replenish all defined resources by default)
Actor:checkPool, Actor:learnPool, Actor:learnTalent, Actor:unlearnTalent, Actor:preUseTalent, Actor:postUseTalent, Actor:getTalentFullDescription
This eliminates the need to use the hooks/callbacks in these functions for (almost) all defined resources.
Added comments in tome:load to explain for addon developers how to create resource definitions to take advantage of these changes.

Resource definitions can set .hidden_resource = true to prevent display in various player interfaces.
Resource definitions have a .color ("#COLOR#") field set to display resources with a consistent color in various places.

Updated the Classic and Minimalist uisets and the CharacterSheet to look through the list of all defined resources for resource values to display.
Classic uiset:
	Fixed some formatting problems that were causing some resource values not to display properly.
	Added some variables to make resizing the player panel easier in the future.
	Added the log_lines parameter to the Game Options menu.

Minimalist uiset:
	Reformatted resource graphics/text to be more clear and to avoid unreadable text.
	The ui will go through a series of default checks to search for appropriate graphics for each resource.

The general tab of the CharacterSheet has been adjusted to provide room for more resources and will now display their regeneration values.

Added/updated tooltips for several ui elements.