white space diffs.
remove un-necessary header include; and some white space diffs.
Add support for write authorization for Characteristics.
employ write-authorization support in simplifying URIBeaconConfigService.

fixes #12
white space diff.
minor rename of a variable
Release 0.2.9
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API enhancements to support read/write authorization for GATT accesses.

Enhancements
~~~~~~~~~~~~

* Add support for authorization, whereby the user application can receive a
  callback to authorize a read or a write on a characteristic's value
  attribute before GATT commits the transaction. We now have an API for
  GattCharacterisitc called setWriteAuthorizationCallback() which can filter
  incoming access requests before they get applied to the GATT database.

Bugfixes
~~~~~~~~

Compatibility
~~~~~~~~~~~~~

This release is backward compatible with 0.2.4.