Arduino 1.6 Command Line Execution

[ergreen]

I updated CompilerHandler to assemble a command line request to arduino with appropriate flags and build parameters. The handler then finds the appropriate compiled output file, reads it, and outputs in JSON format. Problems to be overcome: I'm still having difficulty calling the Arduino java tool using PHP exec(), as when I use CURL to test, it simply hangs and doesn't get a response, even when redirecting stderr to stdout. Also need to read all JSON variables from the input, and figure out a way to cache libraries before calling the command line tool if they are not included in Arduino Core files. I will work on ironing out these issues this week, but could use assistance figuring out the unresponsive exec("./arduino --get-pref update.check 2>&1",$output); issue. #23