fix(contrib): use 1GB per VM

Most modern laptops have ~8GB of memory available to them. On OSX,
this is stretched even thinner due to boot2docker. Lowering the memory
requirement for each host back to CoreOS' default memory requirements
should allow us to use Vagrant on machines with less than 16GB of
memory.
ref(deisctl): use package version
fix(deisctl): hook up unit tests
fix(deisctl): fixup unit tests
fix(deisctl): fixup most of `go vet` errors
ref(tests): separate unit tests from functional tests

That way we can fail faster if the unit tests fail.
Merge pull request #2777 from bacongobbler/use-pkg-version

ref(deisctl): use package version
Merge pull request #2770 from bacongobbler/hookup-deisctl-tests

Hookup deisctl tests
Merge pull request #2746 from bacongobbler/lower-mem-requirement

fix(contrib): use 1GB per VM