Improved juju get help
Merge pull request #1167 from dimitern/lp-1392544-better-docs-for-juju-get-in-master

Improved juju get help

According to this bug http://pad.lv/1392544 the output
of "juju get" was somewhat confusing because the "default"
field in the output looks the same as "default" field in
the charm config definition, but they mean different things.

This PR ports the approved #1166 into master.

(Review request: https://reviews.vapour.ws/r/478/)
Rename ListNetworks to Subnets
Fix openstack provider
Comment correction
Merge pull request #1168 from voidspace/rename-listnetworks

Rename environs.Environ.ListNetworks to Subnets

The ListNetworks method on the environs.Environ interface really returns info about subnets, not "networks". Method renamed appropriately.

(Review request: https://reviews.vapour.ws/r/479/)
Merge branch 'master' of https://github.com/juju/juju into allocateaddress-maas
Renaming after switch from ListNetworks to Subnets