add basic example for playing around and testing
use vagrant-cachier 0.6.0 syntax

this was a breaking change for us, because the warning output by
vagrant ssh-config ended up in our cache of the ssh config, making it
invalid.

this should fix #17
flip the IP for the hostname in ssh config cache

this should address most of the problems with stale configs, since the
remainder of the ssh config does not change between halt/up cycles

refs #5
properly pass argv through to ssh commands

fixes #18

also adding a simple script to check this from the basic example