I think the path to #Zip 1.0 should be as short and simple as possible. Tidy up the public interfaces/existing code and fix as many bugs as possible. Maybe add a feature or two if they are small. Getting rid of the current licensing is in there as well, although in thats not so big a deal in the short term.
I think tidying things up is really the best thing to do at this point.
Current state
The library as it stands is a collection of code from various places that when combined arent cohesive/coherent as a whole. Also the class interfaces are ok in some places and a bit rough in others.
I have a strong urge to restructure things to iron out some of the wrinkles. Probably the only way to do this effectively would be to create a new library or namespace in the existing library and go from there. This was code relying on the existing interface is protected from any changes.