Change default behavior of keys:add to upload as key_comment if available.

This edit will default to uploading the users key as identified by its key comment if the key comment is defined, and gracefully fall back to the older method if it is not.

This should improve usability for some users working from multiple workstations.
PEP8 Formatting
Update deis.py
Switch master to v0.2.1
Full Vagrant provider. Squashed commits
Fixed Flake8 errors
Silence the McCabe checker on two methods, refs #276.
Updated Berksfile format for 3.0.0 beta 3 and Chef to 11.6.2.
Started on docs
Changed sync_folder path in Vagrantfile.local.example to mount parent path
Added missing warning to vagrant provisioning script.
Default login/register URL to http:// schema if it's not specified.
Moved "Terms" section back to top level nav in docs.
Merge pull request #300 from opdemand/299-no-schema-supplied

Fixed #299 -- default login/register URL to http:// schema if it's not specified.
Merge pull request #301 from opdemand/296-terms-sphinx-nav

Fixed #296 -- moved "Terms" section back to top level nav in docs.
Don't prompt users to create an app if runtime=0
Merge pull request #302 from opdemand/250-nodes-scale-msg

Fixed #250 - don't prompt users to create an app if runtime=0
Experimenting with using hostname rather than IP to SSH into host.
User needs ot have avahi-daemon installed though. Also trying to
update the Chef Server with the Deis Controller's 192 range IP so
that rsyslog has the correct IP.

Conflicts:
	Berksfile.lock
	Gemfile.lock
1) Use private network and static IPs for all vagrant VMs. 2) Use
'knife edit' in provision script to override the ipaddress for the
Controller so that subseuent nodes have the correct rsyslog server
address. 3) Use hostname of the host machine to connect to it over SSH
form the Controller, this gets around IP address changes. But it means
use must have avahi-daemon running.
Override rsyslog behaviour by using Vagrantfile to create a higher
priority conf file. This allows rsyslog clients to communicate with
the rsyslog server on the on the Controller.