Taverna 3.0 activities experimental branch

git-svn-id: http://taverna.googlecode.com/svn/taverna/engine/net.sf.taverna.t2.activities/branches/activities-3.0/activity-test-utils@16748 bf327186-88b3-11dd-a302-d386e5130c1c
add .gitignore
Added README
Merge branch 'activities-3.0'