Refactorings -- Misc Cleanup Tasks

[cycomachead]

• Happening now feature specs should be shared between splash page / proposals page. Shared Examples are iffy, could just be their own spec file
• For happening now we need to specify the # of events more easily.
• Admin proposals partial for table could be simplified
• loading of the happening now events shouldn't be in the helper
  • Move the load_happening_now to a service, then set ivars in each controller?