adding text formatters and ckeditor profile configuration

## Ready State: (Yes)

This pull request is related to the following JIRA tickets: [LDC-166 WYSIWYG](https://imagex.atlassian.net/browse/LDC-166).

## Requirements & Dependencies

* no new requirements

## Deployment Instructions

* Merge code.

## Usage/Test Instructions

* new text formatters (Filtered HTML and Full HTML) + configuration, including htmlpurifier settings
* ckeditor configuration for Filtered HTML