Refresh RTI data every 15 seconds (TRELLO#188).
Merge branch 'master' into rti-refresh

* master:
  added initial styling for bus rti #135
  added target='_blank' to external links on blurb
Added spinner when loading RTI info (TRELLO#188).
Clear interval (refreshRTI) on closing a view.
Merge pull request #13 from ox-it/rti-refresh

Refresh RTI info every X seconds