Merge "Update changelog for M8" into cm-11.0

CHANGELOG (notable new features)

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### 11.0.0 M8

* Common: Android 4.4.4 (Google)

* New Devices: Sony Xperia Z2 (sirius); Xiaomi Mi2 (aries); Oppo Find 7a/s (find7); OnePlus One (bacon)

* Common: Fix VPN issues related to 4.4.3 merge

* Common: Enable 'Heads Up' notification mode (Settings > Notifications)

* Settings: 'Interface' replaced by 'Status Bar', 'Notification Drawer', and 'Gestures'

* Settings: Moved 'Expanded Desktop' to 'Display'

* Settings: Moved all lock screen related items to 'Lock Screen' and removed duplicates from 'Security'

* Settings: Moved 'Navigation Bar' layout control to 'Buttons'

* Trebuchet: Custom Homescreen grid size

* Trebuchet: Add Protected Apps feature

* Trebuchet: Add Search Panel (Google Now) option

* WhisperPush: No longer ignores 'Blacklist'

* Futex: Protect against Towelroot

* Various small bugfixes, global and device-specific

### 11.0.0 M7

* Common: Android 4.4.2 (Google)

* New Devices: HTC One (m8); Samsung Galaxy Tab Pro 8.4 (mondrianwifi); Galaxy Note 8.0 LTE (n5120); LG G2 Docomo (l01f)