Updated version number to 2.2 and enabled active dev mode ("Trunk"...

Updated version number to 2.2 and enabled active dev mode ("Trunk" versionstring and no MD5 checking on main wads)

We're officially into 2.2 development now, yay! \o/

git-svn-id: https://code.orospakr.ca/svn/srb2/trunk@8995 6de4a73c-47e2-0310-b8c1-93d6ecd3f8cd