Admin tab functionality

* added insert for one item (test) in the php (using for post and get)
* hard coded items in post function (needs fixing)
* altered view of admin tab (errors still need work)
* Database grabs most recent 4 entries from history
IE Json changes

* Altered method of getting json data (and adding datetime stamp into request)
* starting work on finding which admin inputs have been changed (needs more testing)
General tidy up
Only update changed admin values

* Post JSON data (might be a cleaner way)
* Database query to get ids
* Only update admin values that are edited (no reset button yet)
Merge pull request #2 from gr3yw0lf/master

Additional functionality for Admin tab