Fetching and submitting reviews

In this version I have created and added pages for the following services:

* getReviews(int lid, int pageNo, String sortparam, String direction)  
* getUserReview(int uid, int lid)  
* updateReview(int uid, int lid, int rating, String review)  

In addition, submissions.php has been updated to reflect changes to schema and general structure.

If everything is OK, we should get this merged and put up on live for testing.