Fixed wrong libzip version

Indeed the version is 0.11.2
Update cmake-zipconf.h.in
Merge pull request #17 from reeze/patch-1

Fixed wrong libzip version
Merge pull request #19 from dcsommer/master

Remove unused code.
Fix HHVM OSS build ... Need to bring back Time.h since Acceptor.cpp still uses it
Move proxygen to top level.