Input + Change DOM event support

[Web] Automatic keyboard activation

Removes IE legacy check for touch-based aliases.

Merge pull request #639 from keymanapp/mac-limit-context-to-eighty-chars-in-browser-client-event-handler

[Mac] Limited context to 80 chars in KMInputMethodBrowserClientEventHandler

I had previously made a change to do this in the base class but overloooked that it was also a factor in this subclass, so I refactored a little to have a single method  in the base class that handles this. (Note: the base class method also checks to be sure that the client responds to the attributedSubstringFromRange method before calling it. This used to be done only in the subclass, but it seems like a useful safeguard in case some other client fails to implement this.

[Android] Fix path of special OSK font used for longpress of special keys

Recent change from escape/unescape to encodeURI/decodeURI should have been to encodeURIComponent/decodeURIComponent

Recent change from escape/unescape to encodeURI/decodeURI should have been to encodeURIComponent/decodeURIComponent

Limited context to a maximum of 80 characters

This improves performance and prevents failures in some apps, which return no context at all if the total document size is too great.

In web debugger, keep character preview content in view and show cursor position

Change connection timeout from 10 to 20 sec

[Android] Fix undefined fonts that get passed to KMW

[iOS] Add feature for ad-hoc keyboard distribution via KMP

Per PR review comment, only defined fonts are added to the JSON object going to `kbdInterface.registerStub()`

Developer follow-keyboard-version didn't refresh keyboard version data stored in kps before compiling

Developer follow-keyboard-version didn't refresh keyboard version data stored in kps before compiling

 Clean up font parsing so undefined fonts get passed to KMW as `undefined`, and not `'undefined'`.

Delete the output package file if it already exists to avoid mismatched content