Resize description title and rename sass variable

Description list description title is reduced and now measured in
`em`.
Remove index action from Projects

- Scrub view/js builder
- Remove index action
- Update router
- Remove link to projectspath
Build creator funification

- Change text on build runner
- Go back button now returns user to the project_builds path for
  the current project
Add destroy link to edit project

- Destroy button now on project edit view
- Redirect to root path after project destroy
- Add intelligent go back button to project form partial