Correct misspelling of sponsors
First cut generic Contributing.md file for Travis

Could use some expansion under the actual PR submission notes
Update ember, ember-data and jquery
Main view mostly works on new router
Fix build view and links on left sidebar
Fix attributes and relatiobships in build
Add missing mappings to adapter
Fix job view
Tabs and basic views are mostly working
Fix queues lists
Make sure that repo has a slug when creating a link to repo

Raw repo data is sometimes passed to linkTo helpers and in such case
Repo instance is created by id and it does not include slug. This commit
will be reverted after fixing "incomplete" implementation, which will
allow to preload Repo with both id and slug before searching for it.
Fix running jobs
Implement branches
Fix workers view
Event is no longer passed as an argument to handlers
Add stats view and fix connectLayout
Don't do request to get repos every time home page is reloaded
Allow to sign in and sign out
Add TODO for user's @poll()
Fix profile views