minor gpu TVL1 optical flow optimization:

don't calc diff term if it is not used for epsilon criterion
Added more text/binary/whitespace attributes for files we have.
Disabled whitespace checking for 3rdparty.
Deleted all trailing whitespace.
Normalized file endings.
Converted tabs to spaces.
Merge pull request #1318 from SpecLad:wow
Merge pull request #1317 from jet47:gpu-tvl1-optimization