Added FactoryGirl to GEMFILE to help with creating fake entries and tags for testing.

Created factories for entries and tags and implemented them in the existing specs
Added shoulda matchers to the gemfile, to tighten up the model specs.

Added simple validations for Entry and Tag, to screen dud data from getting in the DB
Switched over to decimal storage for the coordinates....for the future ;P
Created rake task that collects the 20 most recent instagram records for a specific tag or a specific user. It then inserts them into the database.

I added a custom validator to avoid entries with 0,0 as their coordinates (Semi-common data problem with geospatial stuff)

Now validating uniqueness of tags!

Added a sample data return from Instagram, for future reference.