Allows Scopes to receive additional arguments
Refactoring based on suggestions
Adds support for additional arguments for controller helpers

The policy and policy_scope helpers can now be passed additional
arguments to be forwarded onto the Policy or Scope instance.
Fixes little typo
Merge pull request #14 from ayrton/master

Typo fix
Change default index? policy to false

See gh-17 for initial discussion.  I think that the default provided
before this commit is confusing, because an empty result is not a
good indicator of authorization failure.  Returning false better
communicates "override this is you want it".
Merge pull request #18 from bemurphy/default_index_policy

Change default index? policy to false
Describe rspec helpers
Hide authorize and verify_authorized, closes #23
Fix typo in README
Merge pull request #25 from wojtekmach/readme_typo

Fix typo in README
Fix typo in spec example section of README
Merge pull request #27 from vanstee/patch-1

Fix typo in spec example section of README
Arbitrary arguments on authorize
Merge remote-tracking branch 'upstream/master'