First commit with simple stubs
Moving the find cmake files to top level

* made stub fabmap
Making executable to build a vocabulary tree

- just skeleton
Added BOWKMeansTrainer that clusters the vocabulary images

* vocab is output in a yml file
Adding map training data generator

* added missing CMakeLists file for fabmap
* minor changes in style for build_vocab_tree
making the stored yml files compatible with sample
Copying fabmap_sample from opencv/samples/cpp

* to have local changes and modified to be more flexible
Adding directory parsing for map data
Merge branch 'master' into fabmap_sample
generalizing paths for aruco data
Merge pull request #2 from grace-/fabmap_sample

Fabmap sample