Added an option in Game / Online to open most links in the external browser instead of the internal one

Trying to load an old savefile from 1.2.5 will ask if you want to download the 1.2.5 data to play with

Disabled the animated background on the main menu, it was always lagging behind in terms of prettiness
New FontPackages engine class, lets easily define and switch "themes" of fonts
Switched to a new default font, the previous one is still available in the GameOptions as the "web" one

Fixed the "anti inferior to 1.2.0" message when loading savefiles to only trigger for the ToME module

(not complete yet)

added soem code to handle friends, not complete

to be much tested, most work by housepet

Savefiles from 1.1.5 are not compatible, added a message to display this with a link to download 1.1.5