Fix header bus line with local data

Description:

"Change the bus line header to be populated using local data in list"

"When switching buses the header area goes blank until our http request gets a response. 
We can at least populate the header with the bus line while we're waiting."

- added busesLookup object and getBus function to appStorage for fast lookup of buses by name.
- added getBus function call to MapModel to set route from local Storage before doing the ajax call