Added debian subdir
Merge branch 'master' of github.com:skottler/twemproxy

* 'master' of github.com:skottler/twemproxy:
  Add a manpage
  Move nutcracker to sbin instead of bin
  Replace the MD5 code with an alternative implementation, better suited to this codebase (paravoid).
  Replace MD5 implementation
  Update README.md
  define __offsetof only if it is not defined
  libevent.a to encpasulate event abstractions like epoll, kequeue etc.
  support for set ex/px/nx/xx for redis 2.6.12 and up