Add Railtie to autoload macros.
Move railtie require into shoulda/context.rb
Avoid calls to Proc#bind (deprecated in Rails 4.x) when instance_exec available
Merge pull request #36 from ryanfb/master

Avoid calls to Proc#bind (deprecated in Rails 4.x) when instance_exec available

* ryanfb/master:
  Avoid calls to Proc#bind (deprecated in Rails 4.x) when instance_exec available
v1.1.6
Merge branch 'add-railtie'