Updated 'Authorization: BEARER' HTTP token to 'X-Simperium-Token'
Added code for binary_set() and binary_get()

These functions are wrappers for the Simperium binary HTTP API.
They require explicit item ids and key ids in order to function,
because the binary object is referenced by the key on the backend.
Modified get() and set() so that they can automatically handle binary data.

Previously, binary_set() and binary_get() had to be explicitly called.
Now, since the key id is only used with binary data, if it is passed
along to get() and set(), those functions will hand off the transaction
to the binary_ functions.