Converted gamemenu.cpp to unix format.
Made mana bar horizontal.

(cherry picked from commit 69878e7a5e075cc7c9a708ba76293c42b160aeed)

Conflicts:
	src/menus/gamemenu.cpp
Fixed a bug in displaying the mana bar.

(cherry picked from commit 31c843e9bca83c9ace7ec5a74603b67ac78eb545)

Conflicts:
	src/menus/gamemenu.cpp
Using pictures instead of text for ready and go.

(cherry picked from commit dea7fef24789dc120879c32404f36043a543150a)