v0.1.2

Prebuilt port binaries are no longer distributed in hex.pm for Windows users.
You'll need to install MinGW. Feedback was that it didn't work as well as I
thought it would.

• Bug fixes
  • Fix custom baudrates not working on OSX. Thanks to salzig for identifying
    the problem and helping to debug it.
  • Pass flush request through to framer as well as the serial port. Thanks to dhanson358 for this fix.
  • Minor code cleanup