Release Beta

So there's four major things that have happened with BlueMesh recently:

• Messages are now sent with headers describing their size, so the message size limit is as big as a 4 byte unsigned integer can get.
• We've switched to supporting only Android 4.x since the Bluetooth stack is significantly more reliable
• After some testing, we were satisfied that this release is stable enough to be released as a beta.
• We got an honorable mention at the RPI Undergraduate Research Symposium.

That's pretty much it. From here on out we will be focused on getting proper routing to work (as much as we can between classes).