This exports a basic html file, with the option to specify which properties are written. Annotations and their properties are wrapped in div tags with classes specified automatically, leaving ID open for the moment. The point of id for individual annotations will obviously be to link to score items once that is eventually approached. Different annotation lists (as/in bookparts) in a book could also use id's to differentiate themselves from one another.

…ust specific any/all)

…specific most div types - TO BE extended probably

… props

Based on the previous commit the need for a println function is greatly
reduced, and also if we're going to add more functionality I'm pretty sure
that "format" in combination with multline strings will be the better
(and more functionally oriented) way to do it.

I'm not 100% sure if I can impose this but anything other than
keeping indentation the way Frescobaldi does it seems to be
a problem on the long run

This approach includes the necessary conditionals in the
bindings of the parameters themselves, avoiding to have
to separate but nearly identical structures in the branches of the
if clause.

Additionally it fixes an issue when both class and id are present
(where the space was missing in between). Now an arbitrary number of tags can be joined in an opening tag

nest-indent somehow sounds to me like it would actively
determine the current indentation level and add one to it,
while actually it simply indents a given string.

…ing)