correcly parse/highlight all possible \revert argument variants
remove EqualSignSetOverride
allow direct decimal values after the "=" in \set and \override
add NullVoice
handle \tweak in the new syntax
add new 2.18 commands that are mentioned in the changes
parse \accidentalStyle
parse \alterBroken
add \undo, make \undo, \hide and \omit keywords
be a bit more tolerant at the top level
highlight context- and grob names in with, layout and midi
autocomplete accidentalstyle
Merge pull request #339 from PeterBjuhr/master

Fixes MusicXML export
autocomplete \accidentalStyle in layout
autocomplete \hide and \omit
parse and autocomplete \hide and \omit
finetune hide/omit autocomplete
upd chlog
autocomplete new syntax for override and revert
allow capital X and Y in grob property names