Clear xfer data when handler is removed
Use err instead of errno in wavy_listen
Check EWOULDBLOCK on result of ::accept

c.f.) http://linuxjm.sourceforge.jp/html/LDP_man-pages/man2/accept.2.html
Do not raise error when accept is failed
Sleep a while when failed to accept
Merge pull request #17 from gintenlabo/fix-jubatus-issue-717

Fix behavior when ::accept is failed (Fixes jubatus issue 717)
Merge branch 'master' into develop
Fix date in ChangeLog
Update ChangeLog
Bump version to 0.4.4
Merge branch 'release/0.4.4'
Merge pull request #16 from gintenlabo/fix-memory-leak-when-disconnected

Fix memory leak when client is disconnected before sending back results (fixes #12)
Merge branch 'master' into develop
bump version 0.4.5