0.2.0 - Node based refactor

the new unimenu now lets you create & modify menus with node trees, and when finalised, set them up in the app.

the new node based structure is much more flexible, and replaces the menubuilder approach from the first version.

unimenu also became more stable and consistent across several dcc's
with the upgrade, some apps haven't yet been tested due to my demo having run out. e.g. substance painter, marmoset, ...
as soon as i get my hands on them i'll test again