Merge pull request #216 from trevorbernard/master

Fix issue #197
Make Mailbox,Thread and Reaper closeable
Router Handover
Rename xterminated into xpipeTerminated to follow libzmq
Merge pull request #219 from miniway/master

Router handover and cosmetic changes to follow libzmq
Fix exception for inproc bind fail
Merge pull request #221 from gsnewmark/issue-139-fix-inproc-bind-failure

Fix issue #139 for inproc protocol (follow-up to pull request #142)
Fix issue #200