Add ability to append boxes & [in, thing, out] arrays
Add PdBox object
Add wire_to method to PdBox allowing it to create networks
Merge branch 'feature/pd_box' into develop
Add ability for network to append strings. Also some other nonsense I will delete in a moment
Actually keep the stupid stuff because we can't implement >~ on a string :(
Merge branch 'feature/pd_strings' into develop