Fix filename ascii encode error on Python 3
Merge branch 'cdeil-issue-60'
Fixed examples/qt/example1_video.py

- bad Queue import for python3
- worked around a bug in opencv for reporting frame rate
Workaround for issue57, slow starting of reference viewer under python 3

- bumped release
Workaround for a bug in OpenCV on mac os x

- frame rate is incorrectly reported (Issue61)
Made "grc" program work with python3
Updates to menubar creation
bumped release
Updates to GUI building

- added convenience classes for menu and tool bars
- bumped release
Enhancements to Pick plugin

- now can edit the pick rectangle using edit mode
- added a logging feature to log pick statistics to a file
- added preferences to plugin, so many settings can be customized
Fix for compass drawing in Pan plugin (reference viewer)

- fixed incorrect calculation of radius