Begin kit-kat upgrade

* Remove target-densitydpi as 4.4 does not support it
* Change from images to webfonts & tweak some text size
Merge branch 'master' into kitkat

Conflicts:
	scss/style.scss
Start supporting Cordova 3.0+ project layout
Update cordova config
Start work on using Sass features for CSS management
Adjust for navigation bar on Nexus 7
Integrate grit-android repo into this one

* We are combining the repos to make it easier for new developers to get
 started.
Layout fixes.
Import README from master