Texture: add disableSRGBInternalFormat flag to prevent shader recomplie #133
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…iation for RenderTargets
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Description
Add a flag called "disableSRGBInternalFormat" to Texture instances.
If the flag is set to true, we prevent using gl's sRGB internal format, so that the output format of a shader becomes sRGB, which is consistent with what the sceen expects. Thus, we prevent shader recompliation when using a WebGLRenderTarget rather than the screen - the already compiled shaders (who was serving the screen in the beginning) can be used.