Adding Support for Rails 4
debug assets to false
close phantom on completion of tests
Backward compatibility with rails 3.1, 3.2
Revert "close phantom on completion of tests"

This reverts commit 8aac1f7fd3c332fabd66c5307c2c4fad89bd752f.

Previous commit closed phantom early, causing it to exit with
no error before any specs had actually been run.
regen lockfiles after the revert rolled back version number