Make \ifeof always be true (till we implement rest of I/O macros)
add explicit (locked) defn for \pgfutil@InputIfFileExists (since we disable \ifeof)
Add binding for epsf.tex (using epsf.sty.ltxml)
getFirstChildElement returns nothing if no children
bibliography should set bibliography ID globally
LaTeXML::Core::State methods: simplify getActiveScopes added getKnownScopes