Taking ownership of orphaned+retired impressive

[Michael J Gruber]

Package "impressive" used to be available for F13 but is orphaned; it
got marked retired for F14 and rawhide (master) because of maintainer
inactivity.

I took over ownership for F13, see:

https://admin.fedoraproject.org/pkgdb/acls/name/impressive

I fedpkg-cloned it, synced with upstream and ran scratch builds for f13,
f14, rawhide, epel6, all successful.

I'll further cleanup the spec file and go through the rereview and SCM
change process as the wiki suggests.

Just so that you know :)

Michael