bugfix for issue #59, update threading for use with latest glib (2.42)
fix issue #60, improve formatting of requirements-listing, and add path of rabbitvcs for Debian-based distros
fix spaces and tabs in README
Merge pull request #61 from fuesika/master

bugfix for issue #59: update threading for use with latest glib (2.42), fix for issue #60: update of README