Undefine TOLUA_RELEASE by default for better Lua crash protection. Re-enable with the CMake build option -DENABLE_SAFE_LUA=0.
Fixed some Variant constructors failing in Lua (removed void pointer constructor.)
Removed deprecated RenderMode enum.
Added Camera's ViewOverrideFlags to Lua.
Added MultipleViewports Lua sample.


git-svn-id: http://urho3d.googlecode.com/svn/trunk@2613 3bd170d8-ddcf-f82c-f583-7a401ccf5608