Move project selection to navbar
Fix bug where search page did not return traits by project
Absolute path to projects controller, otherwise devise complains
Don't try to display project name unless project selected
Project picker in navigation bar, additional project fields

add description fields, url and url_text
Moved hard-coded project info out of about/index
Created views/forms for CRUD on projects
Improve level funcionality in trait_sets

Populate level from depth in path when creating TraitSet
Add scopes for sorted and by_level
Add class method to get all levels from a relation