Add cleaning process for videos files without event
Merge branch 'dev_lwk4'

Conflicts:
	vp-detection
Change the output format of LogObjects.cpp and ThumbnailWriter.cpp
Use regexp for folder in ThumbnailWriter
Add an EventToObjects module
Merge branch 'master' into dev_lwk4

Conflicts:
	modules/LogObjects/LogObjects.h
	modules/ThumbnailWriter/ThumbnailWriter.h
Small fix in EventToObjects