Make sure empty option has value=""
Updated setObservatory to set observation observatory_id, and clear observatory info if changing observatories
Added CollectionSelectBoxTest, bind polyfill for phantomjs
Refactored ajax methods into ajax/parse method for easier testing
Added ObservationMetaViewTest class
Merge pull request #58 from jmfee-usgs/GMP-302-tests

Gmp 302 tests
Added DeclinationView style partial to include list
Created functional declination view with styles
Cleaned up Declination styles
Imported Observation in ReadingViewTest
Imported ObservationBaselineCalculator in ReadingGroupViewTest
Changed mean default return to 0 if no values
Removed html classes for formatting units and created a formatting method instead
Created tests for initialize and render bindings