Revert "Remove 'strong_parameters' matcher"

Reverting the removal of strong params now that spies have been
introduced into RSpec. Will need to move bourne as a development
dependency once again.

This reverts commit 7e7fb14677fac1e151c93becc3636e7f6731cf51.
Move bourne to a development dependency
Remove explicit require of bourne
Move to 1.9 hash syntax
No longer need to extend Mocha::API
Remove deprecation warning for matcher