Initi
git ignore fix.
Initialization in separate function. Check with reference output file.
Data processing moved to separate function.
Preparing headers to use this project as library.
Reorganization

All actuall code of DenseTrajectories is moved to DenseTrajectoryLib.* files.
The files has been altered in that way, so you can link DenseTrackLib.o as library (available in .build_release directory)
The example way how to use DenseTrajectories is in DenseTrack.cpp it just invoke code from DenseTrackLib
Return features via output parameter, rather than printf (like it was in original version).
Change to cv::Mat as output format.
Merge remote-tracking branch 'origin/master'