Merge pull request #406 from csherratt/master

Add support for ComparsionMode for Sampler
Optimize DataBuffer clear
Merge pull request #407 from bvssvni/master

Optimize DataBuffer clear
Added get_components() method to the texture format. Fixed warnings.
Merge pull request #408 from kvark/tex

Added get_components() method to the texture format
static to const expr
Merge pull request #409 from MaikKlein/master

static to const expr