Add documentation to the run scripts.
Use codejam-commandline to streamline downloads/submissions.

Now one can really with a single command make an attempt at a problem. E.g.:

`bin/attempt.sh 2014 round0 A small 1`

attempts first try of small input for problem A in round0 in Code Jam 2014,
by downloading the appropriate input file, running appropriate solver on the
input file produding an output, and uploading the output along with packed
relevant source code (1 solver + lib). User no longer needs to worry about
doing these steps manually, allowing saving of concentration for more
important things during a Code Jam.