A Free-as-in-movement Implementation of MDP/0.2

See http://rfc.zeromq.org/spec:18.

Goals:

• Forked from Guide examples, to live alone and die free.
• Multiple language bindings (be the first to write one!).

Architecture:

• Broker and core C library is in /libmdp directory.
• Language bindings are under /bindings directory.

Contribution process:

• C4 process is at http://rfc.zeromq.org/spec:16.
• All commits are be backed by issues.
• All commits are made as pull requests from forked work repository.