suse: build fixes

* Bump version to 2.2.1
* Only requires sqlite3-devel and libpcap-devel on Suse 11.x and above
* README was renamed to README.rst
Merge pull request #293 from fajarnugraha/v2.x.x-suse-20130510

Fix suse package to build and run cleanly for current v2.x.x branch