[FEATURE] filtered output of pyper for unnecessary output
[FIX] fixed wrong import path of gui package
[FEATURE] added expression .containsOnlyElements
backuped
backup
[CLEANUP]
Merge branch 'sandbox' of github.com:uweschmitt/emzed2 into sandbox

Conflicts:
	sandbox/feature_grouping.py
Merge branch 'sandbox' of github.com:uweschmitt/emzed2 into sandbox