Support custom loggers
Added ability for client to have multiple redirect URIs which are valid.

The OAuth 2 spec envisions that an individual client can have several redirect URIs that are valid for a given clientId.  This change allows the redirect_uri returned from the model to be either a string or an array.  Added test for an invalid URI when multiple URIs are returned.  Also added tests for valid URIs when either a string or an Array is returned from getClient.
Made modifications based on pull request feedback:

* Using Array.isArray() to determine if client.redirectUri is an array
* Modified names of some tests for consistency
Merge pull request #65 from mjsalinger/multipleRedirectURIs

Added ability for client to have multiple redirect URIs which are valid.
Fix continueAfterResponse when granting (+test case). Closes #66
2.1.1
Using typeof keyword instead of function
Merge pull request #63 from alex-whitney/aw/custom-logger

Support custom loggers
Update OAuth2Error to inherit from base error

OAuth2Error looks like an error, behaves like an error but it's not
actually an error. This can lead to all sorts of erratic behavior if one
expects it to be an instance of Error. These changes are fully
backwards-compatible. The error handler has been updated to keep the
error response compliant with a typical OAuth response.

Several tests have also been added to the error class.
Merge branch 'seegno-feature/oauth2error-inherit-error'. Closes #68
fix incorrect test
Add test for empty token in body
Allow null body

See #69
Merge pull request #71 from thomseddon/fix/allow-null-body-safe

Allow null body
Regarding to:
http://blog.tompawlak.org/new-features-node-express-4

Many middlewares are now external deps, and app.configure no longer
exists.
Big readme cleanup

 - Convert to unix line endings
 - Remove anything other than module init
 - Improve text in places
Merge pull request #72 from jokesterfr/update-to-express-4.x.x

Update examples to express 4
make jshint happy
Update tests to use express 4

Also fixes lockdown method for express 4
Update mocha and should