[Developer] Rename default to '(current layer)' to reduce ambiguity.

[Android] dispatch external keys if KMW doesn't handle them

[Android] Update minimum SDK from 15 to 16

Instead of KMW inserting whitespace, pass those keys back to the embedded app to natively handle.

[linux] more on restarting ibus

[Android] Change keyboard version comparison from Float to strings

Currently, keyboard versions as floats are compared for determining when to update the keyboard.
This doesn't work for the current default keyboard sil_euro_latin version 1.8.1

* Move compareVersions() from KMManager to FileUtils

[linux] build ibus-keyman on xenial

[Linux] restart ibus using user

[Android] Fix "Get Started" status for default keyboard

[Windows] Fix support for Caps Lock headers

Merge branch 'windows-caps-lock-header-fixes' of https://github.com/keymanapp/keyman into windows-caps-lock-header-fixes

[Android] Improve font handling

* log JSON parsing exceptions
* explain remove() usage for API 19+
* revert code in fontUrls()

[Windows] kmshell now only checks for damaged profiles when starting Configuration or Keyman itself

[Windows] Fixes #187. kmshell now only checks for damaged profiles when starting Configuration or Keyman itself