added a line to ignore 'data' directory for possible data
 - this is likely to be changed and use a submodule
fixed typo in row 1
some more content to the notebook, does read the images now, next is display
Merge branch 'develop' into halong_reco
This is mainly to have LICENSE and README file sitting in this branch aswell
fiddeling with features - esp. display ...
finished first pass of displaying ORB-features
small improvements
primarily to feature drawing
added a section for FAST features
finished detection of features, next on to matching