various changes
clean trajectory notebook
delete own traj doc
Merge remote-tracking branch 'pylayers/master'

Conflicts:
	notebook/DOC-trajectory.ipynb
	pylayers/gis/examples/ex_editor.py
1-fix incorrect section name
2-Merge remote-tracking branch 'pylayers/master'

Conflicts:
	pylayers/gis/examples/ex_editor.py
resolve issue in coverage
leading to Layout.di unknown
restore default color to cycles
Merge pull request #167 from niamiot/master

bug fix in Coverage + update slabDB.ini