Changed LC AddForm to dextirity AddForm

Now it will live in the /lc/ folder. That means we don't have to check
if that folder exists. Trying to do so raised an error.
after creating the LC, notify the user and redirect back to LC folder
fix tests to use the new ++add++eestec.portal.lc form
Merge pull request #43 from eestec/issue_36

Issue 36