Added 'absent' to states.reg.
Properly handle bootstrap script in seed and lxc modules.

This is related to be605bc81a43879c15f5b026f5d2529a9b008c7e and #14865.
use randomized & restricted dirs for bootstrap
pep8
doc for config.prep_bootstrap
added missing '='  to 2 python docstring examples
Add py_safe function
Use python safe code filter for virtualenv calls
Include 3D GPUs in GPU grain data

Fixes #15547.
Update to last stable release script, v2014.09.09

* Distro Support Fixes:
  * Updated the URL for EPEL 7
  * PIP based installations on Ubuntu 10.04 need setuptools installed
  * Arch stopped providing the version information on `/etc/arch-release`
  * Complete `salt-api` services checking skips. #450
attempt to delete as a value if not a key
Updated module documentation for clarification

Added note to say that __salt__ is not available to __virtual__.  Also added link to 'at.py' as an example, since it demonstrates using salt.utils in __virtual__ which the existing examples do not. Tweaked wording to make clear that not all the examples are package managers any more.
Merge pull request #15636 from thatch45/py_safe

Add py_safe function
Fix keystone.user_passwrod_update examples

Fixes #15654
Merge pull request #15657 from rallytime/keystone_doc_fix

Fix keystone.user_passwrod_update examples
Merge pull request #15643 from UtahDave/2014.7fixreg

attempt to delete as a value if not a key
Merge pull request #14660 from eliasp/2014.7-states.reg.absent

Added 'absent' to states.reg.
Merge branch '2014.7' into develop
replace version with a jinja variable
Merge pull request #15664 from UtahDave/2014.7fixreg

replace version with a jinja variable