Bridge discovery changes, auth notification

  - will now publish a non-retained message to topic/status/authrequired

if authentication is required.

Adapted to new whiteliste username scheme, API 0.11.2

* 0.11 - 2016/05/28 - owagner/hobbyquaker

  - adapted to new 1.8.1+ API scheme of whitelist usernames being
assigned by the bridge.
    The assigned username is stored using Java Preferences. The scheme
should be compatible
    with already authorized hue2mqtt instances, which used a hardcoded
username of "hue2mqttuser".
  - Hue API libraries updated to 0.11.2.

Added auto-reconnect

v0.10

- remove autoboxing

Various fixes, API 1.8.3

* 0.9 - 2015/10/01 - owagner

  - truncate float numbers to integer when setting integer-only
datapoints. Fixes #6

_inc fix, new eclipse-paho version

* 0.7 - 2015/07/18 - owagner

  - fixed direct datapoint set variant of _inc fields
  - updated eclipse-paho to 1.0.2

SDK 1.8, support for relative sets

* 0.6 - 2015/07/15 - owagner

  - updated SDK libs to 1.8
  - added support for the "_inc" variants of fields. Implements [3]

Adapted to new topic structure

v0.4

- fixed formatting [no-ci]

Initial working release

v0.2

Updated API key