Update CUDA pow

Third time is a charm.
Merge pull request #23 from lcw/pow

Update CUDA pow
[Parser] Added initial parser, only used on files with [.okl] extension (everything in one file since it's only to use as a sample)
[Parser] Merged inline code to sandbox
Merge pull request #24 from tcew/night

Night
 initial simple dg rhs code
Initial travis file
Add gcc 4.9 to travis file