Adds slot add-on
Adds support to slot add-on on example project
Fixes setup.py
Fixes contrib app
Fixes setup.py dependecy
Adds requirements to example project
Adds migrations
Adds missing template
Updates database
Updates media
Improves slot placeholder
Improves slot fields
Adds grid app
Adds basic grid support
Improves placeholder
Improves animation
Adds portlet app
Adds easyportlet template tag
Improves portlet declaration
Improves portlet helpers