Merge pull request #106 from dimagi/i18n

add hindi translations
Note possible libevent issue on OS X

Python library gevent requires libevent. In at least one case of
Mac OS X 10.7.5, this was not installed already. Added instructions
to README.
Merge pull request #107 from kennknowles/master

Note possible libevent issue on OS X
update submodules
update corehq
Update locale/hin/LC_MESSAGES/django.po

Updated all remaining translations
Merge pull request #109 from theism/patch-3

Update locale/hin/LC_MESSAGES/django.po
update hindi compiled translations