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.
Resolve deprecation (Money 6.1)
Resolve deprecation (Money 6.1)
Merge remote-tracking branch 'origin/master'

Conflicts:
	lib/money-rails.rb
	money-rails.gemspec