Bug 998299 - Add Neo layout

[Neo](http://www.neo-layout.org/) is another layout for keyboards.

Since Neo request at least 11 keys in each line this is a adaptation
of it to mobile devices (a adaptation to Android is available at
https://play.google.com/store/apps/details?id=com.anysoftkeyboard.languagepack.neo2&hl=en).
Bug 1009368 - Configure keyboard correctly
Bug 1010394 - Refresh the items when entering the carrier panel
Bug 1012627 - Use the "Dot" reporter on Travis r=yurenju
Bug 1012545 - Prevent a fluffing/rendering issue on the add-contact-button.
Bug 1003060 - [VR][Messaging] Empty circle to the right in messages without recipient
Bug 986506 - [system] Offline warning when downloading updates looks broken with longer text
Bug 1010990 - (gaia-buttons) Create gaia-buttons web component
Bug 1008039 - [Flame][Camera][1.4][2.0] Tapping the 'switch camera' button 4 times rapidly results in black viewfinder
Bug 1011087 - Hide the keyboard at the beginning of an edge gesture.
Bug 1009963 - Making sure the fullscreen status bar panel doesn't steal focus from the active app.
Bug 1003080 - [VR][Messaging] Grey Stroke that circles the contact's photo looks pixelated
Bug 1012692 - (vertical-homescreen) Add option to change the wallpaper
Bug 985995 - BB . Visual Refresh. Create separate headers for Comms Apps
Bug 980394 - Removes references to mozMobileConnection and references mozMobileConnections in the call screen and dialer.
Bug 1013599 - Add Swahili (sw) locale
Bug 991052 - keyboard layout switch function is not available in utility
tray.
 - Do preventDefault for mousdown event on statusbar.
Merge pull request #19242 from RudyLu/ime/Bug991052

Bug 991052 - keyboard layout switch function is not
r=alive.
Bug 1006801 - Disable places provider if rocketbar isnt enabled. r=kgrandon
Merge pull request #19419 from gtorodelvalle/comms-bug-985995-new-header-for-comms-reloaded

Bug 985995 - BB . Visual Refresh. Create separate headers for Comms Apps