[Module] Be able to easily create a bundle(not finished)
Fix some implicit long-to-int cast warnings, appeared on OSX 64Bit with XCode and LLVM GGC
Fix wrong copy/paste
Replace C casts by C++ constructor wherever it's possible
Continue the "Solarus Bundle" module
Update doc to build the bundle
Update and simplify flag names on CFBundle Module
Fix the write dir on Mac OS

Conflicts:

	src/lowlevel/FileTools.cpp
Fix warnings
Move comment
Make sure git won't ignore the tools/org/solarus directory.

I had strange problems with files wrongly ignored when marking them as
resolved in conflicts, and commits present but ignored somehow...
Finish to fill the Info.plist template
Fix wrong cmake variable name
Fix install path
Update copyright
Fix Info.plist additional lines
Attempt to fix tabulation size
... and finish polishing the bundle module
Move all bundle part from main CMakeList to the bundle module
Set a conf variable with the solarus_static name