Implemented geocoder data storage

  *create table locations
  *modify control flow for coordinates retriever
  *modify tests to match changes
deleted p statements
wrote unit tests for new methods
made create_location private
staged and commited models and migrations
merged and renamed coordinatesretriever in code
unit tests passing
Merge pull request #103 from LightningLord/store_addresses_and_coords

Store addresses and coords
Merge branch 'master' of https://github.com/LightningLord/errandsontheway