Explicitly load AR unless already loaded

Fixes #125
Add rspec matcher: act_as_paranoid

Fixes #126
Minor changes to make it more slightly readable
Merge pull request #127 from krainboltgreene/patch-1

Minor changes to make it more slightly readable
really_destroy! will now really destroy dependent = :destroy associated records

Fixes #117
Use an unscoped call on associations within really_destroy to REALLY DESTROY ALL THE THINGS

:bomb:
Really only destroy associated records
Mention latest changes to really_destroy in the readme
Use Rails 4.0.4 and Rails 4.1.0 in travis
Fix query to be qualified with the table name

* Refactored paranoia_column to delegate to the class