Updating response data to decode into a php array

Updating the response JSON decode into an array, for a uniform approach
across all response processing.
Removing temporary webhook_type variable

Removed temporary reference to the webhook type because it was
duplicate data, and to increase readability of code.
Updating partner mapping read calls

Updating partner mapping read calls to work correctly for users.
Added/implemented function to decode JSON response

Added and implemented a function to decode the JSON responses from a
\Guzzle\Http\Message\Response object.
Added webhook data manipulation functions

Added webhook data manipulation functions to fix problems with calling
the partner mapping api functions.
Implemented the new data manipulation functions

Implemented the new webhook data manipulation functions to fix problems
calling the partner mapping api functions.
Cleaning up outdated/dbg comments

Removing outdated/dbg comments
Updating code annotations