Merge pull request #7 from hintjens/master

Renamed project to libcurve
Merge pull request #8 from hintjens/master

Renamed project to Curve, and project prefix to 'curve'
Merge pull request #9 from hintjens/master

Various cleanups to core
Merge pull request #11 from hintjens/master

First draft of client & server sockets (high level API)
Merge pull request #12 from hintjens/master

Finished high level socket first version
Merge pull request #13 from hintjens/master

Fixed comments about client transient key
Merge pull request #14 from hintjens/master

Implemented modified INITIATE command
Merge pull request #15 from hintjens/master

Removed dangling keystore/keypair headers
Removed use of deprecated zmsg_push