Cleaned up game log message rollback to only remove use messages and messages generated by the talent action/activate/deactivate functions when a talent fails to complete (i.e. returns nil/false).  This is controlled by a new flag, ActorTalents._silent_talent_failure that controls game log rollback. (Previous behavior is the default).  In ToME, setting NPC._silent_talent_failure=true and Player._silent_talent_failure=false removes messages for failed NPC actions but leaves them up for failed player actions.

Fixed formatting of lua error output for errors originating inside coroutines external to the useTalent function.

Updated the onTalentLuaError function to provide more information (to stdout) on talent failures, and added extra calls to ensure it is invoked by talent use errors.  Error info is saved to actor.talent_error (first error) and game._talent_error (first error for last actor to error out).

engine.Game.tick will now save up to the last 10 lua errors (current tick only) in a table: game.errors (cycling index, retaining first-out and last-out errors) to make tracking down compound errors easier.

Added the LUA_CONSOLE key-bind to the ShowErrorStack dialog (requires config.settings.cheat).

Added a new logTalentMessage function to ActorTalents.lua (automatically called by useTalent unless silent) to handle basic talent use messages and overloaded this function for ToME's custom messages. (This permits useTalent to distinguish normal use messages from those generated by preUseTalent.)

Added basic game log function stubs (logSeen, logPlayer) to engine.Game.  (Mostly for clarity, displaying expected arguments)

yay

git-svn-id: http://svn.net-core.org/repos/t-engine4@6436 51575b47-30f0-44d4-a5cc-537603b46e54

git-svn-id: http://svn.net-core.org/repos/t-engine4@4973 51575b47-30f0-44d4-a5cc-537603b46e54

Fade From Time now reduces all status effect durations (good or bad)
Voice of Telos has new effects (check it out!)
Increased Quiver of the Sun capacity to 12
Wards (activatable staff ego that protects against damage)
Staff's now give a bonus to elemental damage equal to their combat damage
Most staves now allow the wearer to switch elemental properties using the command staff talent
Base staff spellpower increased



git-svn-id: http://svn.net-core.org/repos/t-engine4@4969 51575b47-30f0-44d4-a5cc-537603b46e54

git-svn-id: http://svn.net-core.org/repos/t-engine4@4968 51575b47-30f0-44d4-a5cc-537603b46e54

git-svn-id: http://svn.net-core.org/repos/t-engine4@4955 51575b47-30f0-44d4-a5cc-537603b46e54

git-svn-id: http://svn.net-core.org/repos/t-engine4@3087 51575b47-30f0-44d4-a5cc-537603b46e54

git-svn-id: http://svn.net-core.org/repos/t-engine4@2694 51575b47-30f0-44d4-a5cc-537603b46e54