sync with Context as of 2013-05-10
do without text figures in libertine for the time being
set node mode more accurately
[doc] avoid problem with hologo and node mode

don’t ask
remove meaningless statement
[rfc] proposal for font name fallback
remove cruft from auxlib
sync with Context as of 2013-05-10
Merge pull request #58 from phi-gamma/master

sync; various fixes (node mode, manual etc.)