Merge tag 'milestone-1' into develop

milestone-1
Note node.js version dependencies
jstree and tinymce versions; move to demo page tinymce.html
rng2js correctly handles oneOrMore required or not elements
clean up xsl
initial (empty) editor-level CSS, hard-coded loading
start converting rng ordering to js
fix empty order blocks
speed up rng2js handling of known namespaces
add entity subset
xsl comments
re-fix xml: attribute prefixes in namespace map
add endTag support to treewalk
Add escapeHtml
Move treewrapper css to editor.scss
Initial tree node title handling
remove unneeded Change command
improved title translation handling for table tree nodes
body, ref-list title improvements
add keyword tree node titles