new PHP sdks 

Hi Ive created a new Branch sdks/php5 with a new PHP SDK I then merged with master I hope this is how to issue a pull request as I could not issue a pull request on a branch that not in the main  repo .. Please read the README.md file in the new sdks folder and it uses PHP composer to package management so the url to a public git repo is in the composer.json file within the new SDK so you can install it into any composer management project