Update README and test data configuration

Added MIT LICENSE.

Add neighbor-based matching, but perform pretty bad

Adding 'matching with radius'

Rename vo member variables

Add more params to config and improve algo

Add display time and output folder option

Add save display & show matching at vo-init stage

Clean parameters' naming

Fix 2 bugs pointed out by 'fredO13'

Clean config.yaml

Update file structure in README

Clean code in epipolar_geometry.cpp

Move src files to src's folders

Clean up all the 'using namespace std cv' problem