Merge branch 'searchblockmap-backport' into 'next'

SRB2.cbp

src/CMakeLists.txt

src/blua/Makefile.cfg

src/lua_blockmaplib.c

src/lua_libs.h

src/lua_script.c

src/sdl/Srb2SDL-vc10.vcxproj

src/sdl/Srb2SDL-vc10.vcxproj.filters

src/win32/Srb2win-vc10.vcxproj

src/win32/Srb2win-vc10.vcxproj.filters