make server_entity::spawned a bool


git-svn-id: https://svn.code.sf.net/p/sauerbraten/code/src@5042 07af1644-1164-4067-b897-63bf4dc9b748
move GL extensions into glexts.h


git-svn-id: https://svn.code.sf.net/p/sauerbraten/code/src@5043 07af1644-1164-4067-b897-63bf4dc9b748
add glexts.h to VC filters


git-svn-id: https://svn.code.sf.net/p/sauerbraten/code/src@5044 07af1644-1164-4067-b897-63bf4dc9b748
Merge remote-tracking branch 'sauerlab/master'

Conflicts:
	Makefile
	engine/texture.h
	fpsgame/server.cpp
	rpggame/Makefile
	rpggame/rpg.vcproj
	vcpp/sauerbraten.cbp
	vcpp/sauerbraten.vcxproj
	vcpp/sauerbraten.vcxproj.filters
	xcode/sauerbraten.xcodeproj/project.pbxproj
now server_entity::spawned is bool