Setupification

* i realised my last pull request was on master, this is on andymckay as it should be
* added in `mkt up` command that updates the file only if it needs to

[setupification] marketplace-env $ bin/mkt up
Written fig file to /Users/andy/.mkt.fig.yml
Recreating andy_spartacus_1...

then

[setupification] marketplace-env $ bin/mkt up
Recreating andy_spartacus_1...
it's not externally exposed, so easy to rename, but sure will do.