jsonToMySQL function added for a future 2 way sync

jsonToMySQL function transforms the json produced by webSqlSync.js on
the client side into INSERT / UPDATE query for MySQL. This is the first
step to create a full 2 way sync between webSQL and MySQL.
Vital changes to anable the ServerToClient sync

Note: This file was renamed to sqlSyncAdapter.php
To replace the sqlSyncHandlerTest.php file

I renamed the sqlSyncHandlerTest.php by this file
Called file name changed

I renamed the sqlSyncHandlerTest.php to sqlSyncAdapter.php