Add a ZipInputStream

This version just writes out a temporary file and hands off to ZipFile.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Merge remote-tracking branch 'dscho/regex-v2' into HEAD
Implement Runtime#{free,total}Memory()

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
wip

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
debug