Mount parentdir as /home/vagrant/frenetic
Merge pull request #288 from frenetic-lang/vagrant

Mount parentdir as /home/vagrant/frenetic
Initial Consistent Updates commit

Compiles, untested
Updates pass the test.kat test
Snapshot updates test app.

Currently breaks when Controller actions get spliced in, which causes unrealizable mods. Easy fix is to stamp VLAN
fix delete old flows
Added barriers/ivars