NOBUG: Set default timezone to Australia/Perth.
NOBUG: Added --show option to display changes.
NOBUG: Allow rcs (and others) to come from + versions.

Before the patch it was required for rc to come from
dev/beta without any "+". Same for majors. Now both
support coming from a previous "+" version.
Merge pull request #12 from stronk7/showing_the_reality

New --show option added
Merge pull request #13 from stronk7/rc_fixes

NOBUG: Allow rcs (and others) to come from + versions.