Switching to use Appraisals to manage differing sets of gems for various versions of ActiveRecord
Merge pull request #2 from bsedat/appraisal

Switching to use Appraisals to manage differing sets of gems for various...
Remove newline from encrypted field and iv
Use SecureRandom instead of rand
Clean up use of the algorithm option and iv creation, adding docs
Add an adapter for Mongoid. Will remove necessity for explicitly specifying :encode => true.

Conflicts:
	attr_encrypted.gemspec
	test/test_helper.rb
Updating the Mongoid adapter with tests for iv/salt. Adding appraisals for various Mongoid versions