Check that uniform values are stored on programs
Merge pull request #220 from greggman/test-uniform-values

Check that uniform values are stored on programs
increase tolerance in uniform-value-per-program test
Merge pull request #221 from greggman/test-uniform-values

increase tolerance in uniform-value-per-program test
add a few more variable names to uniform--values-per-program test
Merge pull request #222 from greggman/update-per-prg

add a few more variable names to uniform--values-per-program test