Changing rollup behavior according to COG-556.
Setting symmetrical=False for the peer relationship.
Updating .gitignore
Allowing a project to have multiple parents.
Working on parents relationship.
Working on parenting.
Working on parenting
Fixing links for updating of templated pages.
Inserting ProjectTag.
Adding project tag form.
Working on refactoring the projects widget.
Working on refactoring of project browser.
Perfecting the opened status of the widgets.
Merge branch 'devel' into luca
Adding placeholder for tag input.
Fixing scrollbar.
Improving the autocomplete widget.
Inserting comments.
Removing obsolete code.
Merge branch 'devel' into luca