ref #112 fix uint setUniform. Use signed int for sampler in FramebufferObject
Merge pull request #118 from hpicgs/FixSamplerUIntUniform_112

ref #112 fix uint setUniform. Use signed int for sampler in FramebufferObject
Merge remote-tracking branch 'origin/master' into CameraAbstrWithPathTracing_105_77
ref #77 fix signed/unsigned errors with uniforms