Use an output renderer to show minions that did not return

Two main reasons:
1. Output can be customized / colored (minor)
2. Data on minions that did not return is passed up.  This allows custom
runners to process the data.
Add back target filtering, but also include list targeting.
Add initial migration routine
Add digital sig to the clientcerts
Clean up the virt.migrate function
Change to cache mode none
Set virt migrate to be tunneled
Catch cross condition in making vm image directory
wrap web_url in quote before pass to wget
Merge branch 'develop' of github.com:saltstack/salt into develop
Fix a regression in the stateconf renderer and updated docs.
Merge pull request #3893 from hvnsweeting/develop

Quote web_url before pass to wget
Merge pull request #3896 from kjkuan/stateconf-bug-fixes

Fix a regression in the stateconf renderer and updated docs.
Use file.contains_regex to check for successful sed change
Join a line that didn't need to be broken up for PEP8
Merge pull request #3897 from basepi/sedfix3837

Fixes #3837 Fix file.sed state to use file.contains_regex for success check
Make /usr/bin first in path to ensure that system python is used
version bump for pending release
Merge pull request #3899 from dlindquist/upstart-fix

Make /usr/bin first in path to ensure that system python is used
Added one-line descriptions to pydsl and stateconf renderer modules

The Latex output did not like field lists as the first thing in the
docs.