Changes

Fix zsync-pool2dest.sh: Properly name previous-snapshot for incremental backup!

Massively rewrite project handling. Projects are now defined by directories of
(mostly) single-line config files (essentially a glorified directory-based key/value
db). The scripts have been adjusted to work better in isolation (in particular the
old copy-jars script has been split into a copy-jars-one and copy-jars script, with
the latter executing the former on all projects).

Bug 999: Is now fixed. Essentially a variable name was accidentally re-used, meaning
the source zip file was copied over the project's main jar file. The -n option was
passed to cp, but not the subsequent mv, so the overwrite occurred silently!