Handle navigating into zip/archive files. Sweet!
We need cl for caddr and other usefuls.
A couple of simple servlets to dump our data.
More progress and revmapery.

- Project metadata is now inferred using ProjectModel from the start, no more
Maven hackery.
- Introduced Depend which knows its flavor (what kind of project introduced
this depend), which simplifies knowing where to look for said depend.
- Ported import insertion over from findclass. Remains
Java/Scala/CS/AS-centric, but we can generalize later.
- Other tidying.
Express Scala depend in POM.
A bunch more progress.

- (Basic, fragile) SBT project support.
- Filtering queries by kind (currently only by /query/import).
- Better handling of test code (query main project's test code but not depends
  test code; eventually can be smart and add test depends when initiating query
  from within main project's test code).
- Other small improvements.