Update to the latest beta release with support for Android L ble api's

[snargledorf]

Not sure if you want this in the main branch or not. If not let me know and I will update the pull request.

Also thank you for doing this. Saved me a lot of time and research on how to bind native libraries.

[chrisriesgo]

@snargledorf - Thanks for submitting the pull request. Sorry for not responding sooner. I wanted to wait until an official 2.1 release before updating master rather than shipping a beta build. In the future, I'd be happy to ship a pre-release build in a pre-release branch (something other than master) for those who may want to live on the edge a little :)

For now, there's a v.2.1 branch that has been updated while I test and update my sample app. Once those have been set back up, I'll merge the latest build into master.