Ansible-tower-cli

This is a minor bug fix release that addresses the largest pain points observed since the 2.3.0 release. Those fixes include:
- Fixed bug affecting force-on-exists and fail_on_found options
- Changed extra_vars behavior to be more compliant by re-parsing vars,
even when only one source exists
- Fixed group modify bug, avoid sending unwanted fields in modify requests

- Fixed an issue where the settings file could be world readable
- Added the ability to associate a project with an organization
- Added setting "verify_ssl" to disallow insecure connections
- Added support for additional cloud credentials
- Exposed additional options for a cloud inventory source
- Combined " launch-time extra_vars" with " job_template extra_vars"
for older Tower versions
- Changed the extra_vars parameters to align with Ansible parameter
handling
- Added the ability to run ad hoc commands
- Included more detail when displaying job information
- Added an example bash script to demonstrate tower-cli usage