Qa and extension modules

## Ready State: Yes

This pull request is related to the following JIRA tickets:   https://imagex.atlassian.net/browse/LDC-219

* new extension modules:  imagex_events_permissions, imagex_events_workflow
* Removed permissions and workflow from imagex_events
* Updated CT to use scheduler 
* Added README.md to imagex_events and extension modules

## Requirements & Dependencies

* imagex_events, features

## Deployment Instructions

* Merge code.

## Usage/Test Instructions

* Confirm event content type and extension modules perform as described in README (ie; appropriate fields or functionality are added)
* Visually view the changes on the homepage.