Allow use of validates method with MoneyValidator
The validates method requires that the MoneyValidator be available in the
ActiveModel::Validations namespace.

This lets us use validates :amount, money: { :options }.

Sponsored-by: CentroNet Marketing.
Tests for validates method
Remove redundant logic in activerecord/monetizable
Update README with gem version and license badges
Silence Money deprecation warnings in tests
Ignore the dummy db files
Provide a rake task to prepare test environment
Update schema for dummy project
Move pry to development group
Tweak travis to solve failures
Merge remote-tracking branch 'CentroNet-Marketing/fix-validates-method'

Conflicts:
	spec/dummy/db/development.sqlite3
	spec/dummy/db/test.sqlite3
Update contributors file
Use the new monetize gem to parse money values

- Temporarily, we use money 6.1.0.beta1 till a new stable version
  is live.
Update README
Fixing rakefile bugs, improving test environment setup
updated readme and made gitignore skip schema file
Adding mongo comment to test info in redme
removed schema from .gitignore, should have been taken out on the first place
Merge pull request #162 from Vlipco/update-test-env

Update test environment related files boot.rb, Rakefile, Readme...
make test pass.