remove turbolinks
create rails 4 concerns from helpers

- move GithubHelper to a concern
- move RepositoryHelper into a concern
- create a `#fetch_gh_repo` method in GithubHelper
- move local git methods into GithubHelper
- remove duplicate `require 'json'`
use new `#fetch_gh_repo` method
Point the code-review button at a new_code_review action in the repositories controller.
Change the route to accomodate this.
Render show...for the time being. Given the structure of the view, we are probably going need to break this into partials with locals to accomodate to data sources.
May need to make a code-review controller
Merge pull request #80 from alexung/reroute_code_review

Point the code-review button at a new_code_review action in the reposito...
Merge branch 'master' of https://github.com/alexung/hotspot into kris_alex_update_repo_button
Merge pull request #81 from alexung/kris_alex_update_repo_button

Show repos on dashboard
Links on user dashboard link to the individual repo
fix mc
Merge pull request #82 from alexung/concerns

REVIEW BEFORE MERGE: Concerns Refactor
Merge for pull
Merge remote-tracking branch 'origin/master' into reroute_code_review
Remove empty welcome helper
Removed unneeded branch method from repository_helper concern
Break out the search into it's own controller to stay restful
Include github helper in search helper so that the search can use the api calls
RESTfully remove the seach index from repos and place in search controller
Add clarifying notes about what portion is responsible for code_review vs api
Point the search path at the search controller
Render repo index