Init plans app
Add models for plans app
Add plans model tests
Add basic views for Plan
Update fab test

Support fab test:app_name and fab test:app_name,test_name

Conflicts:
	fabfile/fab_check.py
Update ccustom filter add_attr
Improve meals model tests coverage
Add basic views for Stage
Implement plan join
Highlight the selected menu
Update plan index page
Add basic views for stage meal
Implement plan timeline
Merge branch 'feature/plans' into develop