Add a comprehensive library of Gaussian blur functions, along with .cg
shaders that use them and testing/benchmarking .cgp presets.  Also add
srgb-helpers, a collection of canned .cg files for linearizing the first
pass and gamma-correcting the last pass differently depending on whether
another display is being simulated (e.g. a Game Boy Advance screen).  Both
rely on tex2D* wrappers in gamma-management.h to make it trivial to switch
between gamma-correct sRGB and non-sRGB pipelines.  Reusable headers are
kept in the include directory (currently blur functions, gamma management
wrappers, and pixel quad communication functions.)
Convert some Windows newlines to Unix newlines.
Merge pull request #15 from TroggleMonkey/master

Add a comprehensive library of Gaussian blur functions (and more)...