Fix visual studio build
Remove dependencies on package 'example' in examples
Add HoughLinesP to cvimgproc
Rethrow interrupt exceptions in connector observers
Remove package 'Example'
Fix python observer example
Bugfix: deinitialize operator kernel; multiple operators initializable accessing the same internal camera
Merge remote-tracking branch 'uboot/master' into WebCamera
Intermediate workaround for WebCamera operator crash on some Linux distribution in case of multiple instances initialized