Merge pull request #4 from svenfuchs/patch-2

remove stray quotation mark from readme to fix the travis-ci build status image

Just use bare array.

Wrap body in [] for Rack

Adds custom failure app, makes all error messages consistent w/ OAuth 2.0 specs.

Fixes up gemspec.

Update gemspec to include rake.

Switch to rb-fsevent

Adds #scope? to clients as well.

Adds Travis

Fleshes out Token strategy.

Updates README

Initial import, implements Bearer Client and Public strategies.