update to 2.1.0
The MRAA project is joining the Eclipse Foundation as an Eclipse IoT project.

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>

Also added back the version patch to fix compilation with libupm.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Switched to codeload for simplicity and easier package bumping.

Rearranged Makefile for consistency with other projects.

All of the patches seem to have been upstreamed.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

This version is compatible with the version of node currently in use.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

Signed-off-by: Stefan Weil <sw@weilnetz.de>

Signed-off-by: John Crispin <blogic@openwrt.org>

mraa is a lowlevel io bus abstraction layer. it allows us to export bindings for
various linux io busses for node, python, ...

Signed-off-by: John Crispin <blogic@openwrt.org>