9: Added TIMEZONE_CHANGED receiver

Modifies default timezone as it changes with the system.
Moved tests into library subdirectory
Configure multiproject setup for joda-time-android

To make way for a sample
Added basic sample project

Does not actually show anything off yet; it's just the shell that
will be filled with samples later.
Initialize joda-time-android in sample
Rename classes, setup base sample theme
Added easy way to add samples
Added samples
Bumped version number to 2.3.3