Added units to the labels on the station view and fixed the way their labels behave. Integrated the graph into the UI, which resolves asascience-open/oos-mobile#14 and  resolves asascience-open/oos-mobile#16.
Added icons for relative humidity, visibility and rainfall.
Merge remote-tracking branch 'origin/Add-New-Icons' into Integrate_Graph_View
Merge branch 'Integrate_Graph_View'