infodeck: emit twitter/facebook metadata
sample: fix sample site generation issues
infodeck: added todo to improve TOC buttons
articles: tweak to similar articles message
core: can add higlights for full lines of inserted code
core: highlight spans with code insert
core: higlight ranges of inserted code
core: tweaks to code highlighter
article: add code remark style
article: first version of a refactoring server
articles: make refactoring server read from directory
article: refactor quote linking, support isbn attr in bib refs
code server tweaks