Add user sidebar to manage profile view.

This splits the user show sidebar into a partial that is then used on the
profile edit view. It updates the sidebar to display a different link based on
the controller (view for edit, manage for view). This makes the manage profile
view look similar to the user view.
Manage Profile view cleanup:
- Adds Foundation forms component to common.scss
- Removes padding and border from fieldsets
- Adds button formatting to various secondary functions on Manage Profile tab views
- Overrides default :focus background color and text color on search textfield to maintain search field design
- Adds paragraph to agreements tab under Manage Profile to maintain consistency
- Changes gravatar field to label to maintain text consistency on Edit Profile tab
Manage Profile - Collaborations changes:
- Adds descriptor paragraph for consistency
- Changes list to tabular format for consistency
- Changes Remove function to button
- Changes Remove function wording to 'Remove Myself as a Contributor'
Merge pull request #402 from opscode/manage_profile_update

Update the manage profile layout and styles