Fix: iren is the the right interactor where to set picker
Calculate polygon area

Code reformatted according pcl standards
Merge pull request #112 from sorts/master

Calculate polygon area
Fix: use a dynamic point picker / area picker switch

Revert back the default picker to a point picker.
When in select mode the point picker is replaced with an area picker.
Point picking events modified accordingly.
Merge branch 'fix_pcl_video_player'
Adding bearing angle image to pcl