Update authic_client.gemspec

Allow Rails versions greater than 3.2
Refer to controller name using AuthicClient, instead of just Authic
Route fixes to be rails 4 friendly
Fixed loadpath issue with helper class
Merge pull request #1 from ctrand/master

Fixed loadpath issue with helper class
Use http delete verb
Fix name of engine in initializer
Remove 'generator' namespace
Update readme to refer to Rails4
Include the file extension on the end of the generated migrations
Increase version for Rails4 support
Merge pull request #1 from jpmcgrath/rails_4

Support for Rails 4