Major Release for Tower3.0

• Added text indicator for resource change
• Allow hosts, inventory, and groups to use variables from the command line
  and denote a file by starting with "@"
• Added resource role for tower3.0 and permission for previous tower versions
• Added notification templates
• Added labels
• Added description display option
• Added deprecation warnings
• Help text upgrades
• Give indication of "changed" apart from color
• New credential fields to support openstack-v2, networking and azure
• New options for inventory source/group. Add implicit resource inventory
  script.
• credential updates (no longer require user/team)
• Added support for system auditors
• projects (do not post to organizations/N/projects)
• prompt-for JT fields + job launch options (allow blank inventory too)
• Update the POST protocol for associate and disassociate actions
• New job launch option for backwards compatibility
• New tower-cli option to display tower-cli version
• Enhanced debug log format (support multi-line debug log)