xml-psi-api initial
couple of classes that XML depends on moved to core-api
extract syntax highlighter factory out of XMLLanguage; add temp invalid dependency on platform-api
extracted XmlPolicy from a method on XMLLanguage to LanguageExtension
move XMLLanguage to xml-psi-api; remove invalid platform-api dependency
xml-psi-impl initial
moving stuff to xml-psi-api and xml-psi-impl
register XmlFileType in XmlCoreEnvironment
preparing to move stuff around
kill a bunch of no longer used code formerly used for xinclude handling