Improve Getting started documentation with instruction for connecting device

[malsolec]

Connecting Android device in debug mode can be complicated for Android newbies, providing the instruction will help to avoid long project set up.

[DragoonAethis]

If 2.0 is supposed to be a complete rewrite, I'd rather avoid having to enable debug mode completely, but have the app export packages with the selected plan and used assets. Ready packages should be saved to the internal/external storage (so that you could plug in the tablet and copy over packages from the app's directory) or shared via Dropbox/mail/etc (Android provides all that), effectively dropping the Linker app.