Add dynamic stock price look-up to manager 

A side effect of this was converting the 
connection module to use the API instead of the
package models
Convert worth view to use API
Remove non api files
Remove non api related code
Remove unneeded modules
Refactor config
Minor edits
Fix tests
Bump to version 0.15.0
Merge branch 'features'
Add comments
Fix import error
Fix circular import
Add new routes
Fix helper
Merge branch 'features'