Merge pull request #460 from Kapishin/master

Fix typos
gemspec for 1.9.20
Merge branch 'master' of ssh://github.com/unbit/uwsgi
add rack to gemspec
fixed v8 RPC
removal of embedded zeromq api
do not spit errors on non x86 timerfd_create
support timerfd_create/timerfd_settime on __arm__
Fix few typos