Also, run the test suite for ActiveRecord 4.1.x.
Replace Delorean with Timecop and Chronic. This avoids false negatives if a second passes between the import occurring and the assertion occurring.
Consolidating the travis build script to make it easier to test multiple versions of active record and to print out what command is running.
Merge pull request #167 from zdennis/chores/travis-activerecord-4.1

Get TravisCI to run the 4.1.x series of tests to