Shorten audio warning text
Change output style
Use message_max in AddMessage
Fix font rendering (without system) in shinonome
Merge pull request #94 from fdelapena/master

Implement Alt+F4 on non-Windows desktops (closes #51)
Update Doxyfile to 1.8.3.1
Use javadoc style code comments for game_* files.
Use javadoc style code comments (h to u and z).
Use javadoc style code comments (Window classes).
Use javadoc style code comments (Scene classes).
Fix typos.
Miscellaneous code comment tweaks.
Fix doxygen warnings.
Fix reported typos.
remove empty destructors
fix name layout
fix kana position, improve cursor moving, remove centering of buttons
improve cursor move in mode change and done button
use stdint.h
BUGFIX: Fix error in the switch validation method.

In the Game_Switches_Class::isValidSwitch(int) method, comparison
for the upper bound (< switches.size) was wrong since switch IDs ranges
from 1 to switches.size inclusive.
This caused easyrpg-player to exit with an error message if the game
made use of the last switch.
Replacing the < comparison operator with <= fixes that.