Adding initial environments user guide
fixes #6575 - Initial document for Activation Keys
Fixes #6986: adding Bastion developer install documentation.

When the bastion documentation was moved to the katello.org
repository we neglected to move the bastion setup instructions.
This commit adds the missing documentation.

http://projects.theforeman.org/issues/6986
Merge pull request #26 from waldenraines/6986

Fixes #6986: adding Bastion developer install documentation.
Merge pull request #7 from parthaa/env

Adding initial environments user guide
fixes #7161 - correctly referencing grunt-cli
Merge pull request #27 from komidore64/rmi7161-bastion-dev-page-grunt-cli

fixes #7161 - correctly referencing grunt-cli
Merge pull request #25 from bbuckingham/issue-6575

fixes #6575 - Initial document for Activation Keys
Refs #7202: Add splash page to announce incoming changes.
Merge pull request #29 from ehelms/splash-page

Refs #7202: Add splash page to announcement incoming changes.
fixes #7201 - Remove 'Lifecycle Management' and move environments to 'Lifecycle Environments'

This commit is just a minor change to clean up a couple of things:
1. remove Lifecycle Management (which is covered by the content in 2 below)
2. move the content in environments to lifecyle_environments

Note: no change was made to the content of Lifecyle Environments.
Merge pull request #31 from bbuckingham/issue-7201

fixes #7201 - Remove 'Lifecycle Management' and move environments to 'Lifecycle Environments'
Activation Keys - fix the layout used for the page
Merge pull request #32 from bbuckingham/akeys-layout

Activation Keys - fix the layout used for the page
Fixes #7199: Add API docs.