Add grape_token_auth gem to project list, closes #31.

Author: mcordell

projects/index.md

@@ -56,6 +56,7 @@ comments: false
 * [grape_api_signature](https://github.com/faber-lotto/grape_api_signature): A RACK-Based AWS Style signature authentication for grape API.
 * [wine_bouncer](https://github.com/antek-drzewiecki/wine_bouncer): Doorkeeper OAuth2 authorization middleware for grape APIs.
 * [grape-tokeeo](https://github.com/wawandco/grape-tokeeo): A simple token authentication gem for Grape.
+* [grape_token_auth](https://github.com/mcordell/grape_token_auth): Grape token auth gem for frontend JavaScript apps ([ng-token-auth](https://github.com/lynndylanhurley/ng-token-auth) compatible).
 
 ### Documentation