Extend Magento REST API for authentication

This is a pioneer task which will lead to the next project, please do not bid this project if you're not 100% sure that you can do this work. You will need to clearly explain which code you will update and what is the main change logic to make it work before we can award you the project. requirement: 1. Code change required to work on both Magento 1.4 enterprise edition and latest Magento community edition 1.9.1.1. 2. please refer to the following two demo: [login to view URL] during the user authorization, user is asked to input username and password on the web page to grant access, the task is to by pass this step, extend the authorize REST API and pass in the username and password as additional input to gain access, so the authentication process will be just REST API call without need to go through the web page to grant access. reference: User Authorization [login to view URL] 3. Please create REST API server and client test code that complies to Magento coding standard: https://wiki.magento.com/display/MAGE2DOC/Magento+PHP+Coding+Standards+and+Practices 4. The final code needs to be tested on our test server, you will be granted for access once done your source code.