Merge pull request #82 from webian/master

Fix role="main" position in 2 columns layout.
Describe and enhance rte config, tables are now responsive by default, css classes have translations now
Enhance accessibility for the accordion
Add missing styling for rte table contextual classes
Adjust processing rules for rte
Add Google Analytics tracking code anonymization - fixes #84
Correct colPos for left column on Layout: Default, Subnavigation Left and 2 Columns - fixes #62
Release 6.2.6