Fixes #1 (32-bit cast issue).
Merge pull request #3 from mezis/fix/32-bit-friendly

Fix: 32-Bit friendly
Fixes API weirdness
[#46818783] Applying PR comments
[#46818783] Minor spec upgrade
[#46818783] directory as mandatory argument to initialize MapGroup
Merge pull request #4 from marcusleemitchell/blurrily/map-group-46818783

Blurrily/map group 46818783
Merge branch 'master' into blurrily/event_machine-server-46824777