Create pull contacts with various roles through a join model

Drop assign-pull-to-user feature
Add TODO item per Harald's request
Change name of contact to requester
Add pull contacts to contacts panel
Make pulls accept nested attributes for pull contacts
Update gems
Use bleeding edge simple_form which (finally!) supports bootstrap 3
Fix change in Rails 4.1 from symbol to string
Rerun devise generators
Fix deprecated :confirm option
Yay! Finally fixed issue where PullContacts weren't saving on Pull#create
cellpadding doesn't work in HTML5
Fix "ghost" alerts with no content
Beef up PullContact specs

Delete redundant specs
Add "New pull" link to home page
Filter out "completed +" pulls from home page
Tidy up buttons
Add dataTables support
Build missing pull_contacts on edit/update
Fix jquery/turbolinks incompatibility