Add documentation for using Operation Transforms in WebODF
Merge pull request #762 from peitschie/ot-doco

Add primer for writing & using Operational Transforms in WebODF
Escape backslashes in concatenated CSS
Merge pull request #784 from peitschie/css2js-fix

Escape backslashes in concatenated CSS
Support selection & deletion of more ODF fields

* Includes a tool to help parse the RNG to figure out text containers
* Add demonstration section to visual-tests document

Fixes #772
Visually distinguish fields from non-field text regions