Improve geocoding tests.

+ Coordinates could already be set in the factored model.
Add first validations for Place model.

+ Prepare factories.
+ Further validations are included but disabled since test need
  to be written first! Please update the documentation in parallel.
Add test for email validator.
Enable more tests for place model (boolean and email attributes).
Adapt tests to seed data.

+ Increase maximum length for name attribute in place model.
+ Add user to accessible attributes aka. enable mass-assignable.
Enable validations and test for farm model.
Fix minor typos.
Enabled validations and test for user model.
Exclude active_admin asset noise.
Disable tests for user attribute on place model.

+ Need to clarify if the user association can be tested this way.

Rewrite pending message.
Fix tests which need to assign the user_id through the place model.
Remove uncomment for pending tests.

+ Pending already stops the RSpec routine on the individual test.
  No need to uncomment the code.
Improve wording on RSpec tests.
use new render syntax (and get rid of annoying deprecation warning).
access association instead of association id

- this restores the default behaviour for associations
- fixes seeds.
fix initialization of date
use an email sequence to avoid duplicates
expect default representation of date (m-d-Y)
update schema.rb to current state of migrations (farms and depots tables are gone)
Update Rails to 3.2.13.