Merge pull request PhilipsHue#143 from PhilipsHue/fix-protobuf-issues

Fix protobuf issues

Merge pull request PhilipsHue#141 from PhilipsHue/lower-minsdk-android

Lower minsdk android

Merge pull request PhilipsHue#133 from PhilipsHue/revert-protobuf-upg…

…rade

Revert protobuf upgrade

Merge pull request PhilipsHue#129 from PhilipsHue/propagate-error-whe…

…n-observing-status-failure-android

Propagate error when observing status failure android

Merge pull request PhilipsHue#127 from PhilipsHue/prepare-version-260

prepare version 2.6.0

Merge pull request PhilipsHue#121 from PhilipsHue/send-disconnected-u…

…pdate-android-on-disconnect

emit disconnected state update when device gets disconnected

Merge pull request PhilipsHue#117 from PhilipsHue/fix-issue-devicesca…

…n-android-on-hot-restart

Fix issue devicescan android on hot restart

Merge pull request PhilipsHue#111 from PhilipsHue/prepare-release-251

prepare version 2.5.1

Merge pull request PhilipsHue#108 from PhilipsHue/prepare-version-250

prepare version 2.5.0

Merge pull request PhilipsHue#98 from PhilipsHue/hotfix-crash-notific…

…ations-android

fix for crash on notifications when device gets disconnected