Don't discard highlighted annotations when merging paragraphs

All text nodes that are children of grouping elements should be counted
as ODF content.

Fixes #666.
Merge pull request #667 from peitschie/odf-empty-fixup

Don't discard highlighted annotations when merging paragraphs
Split Editor into Wodo.Texteditor and Wodo.CollabTexteditor
move fullscreen pinch-zoom into own class FullWindowZoomHelper
add product wodotexteditor
Add HOWTO-wodotexteditor.md
Add README.md to programs/editor
Create API dox for Wodo.TextEditor
Improvements to the usage sample files

fixups, to be squashed
keep backend for collabsession demo conifgurable, instead of hardcoding pullbox

fixup
more fixups to be sqashed
remove unneeded { } argument

fixup split
make some browsers happy, who need "{" right after "return"

fixup
move "use strict" to right position and make dojoConfig global by using window.

fixup split
catch mistake to test the component by clicking in the editor
add note about needing to be served by a webserver

fixup howto