Add Apache 2.0 license file

I can't believe this wasn't already here....
Merge pull request #179 from larsbutler/LICENSE

Add Apache 2.0 license file
vagrant: update zerocloud config filter names

They're all prefixed with "zerocloud-" now, since names like
"proxy-query" and "object-query" are a bit ambiguous.
Merge pull request #174 from larsbutler/vagrant-filter-names

vagrant: update zerocloud config filter names
smoketest: refactor and reorganize

This is prep for extending the smoketests with many more cases.
smoketests: use pytest for running smoketests
smoketests: overhaul
smoketest: full tests for api/1.0

This includes single script and chain execution, with various kinds of
I/O.