Added the c-ares library. It is a requirement for mosquitto.
Added mosquitto.
Changed mosquitto so its library can be compiled as a static library.
Added readme to the vendor directory.
Change CMakeLists.txt to build mosquitto and c-ares library.
Fixed dependency. Mosquitto depends on c-ares.
Updated CMakeLists.
Merge pull request #14 from jbreitbart/master

Add mosquitto to the build system.