Console App to accept input / output directories instead of single files

Using the console app in a VS build events requires a separate event per coffee file. 

I have changed the input and output command line args to be directories instead of single files. All the *.coffee files found in the input directory are then compiled into the output directory as before.

This allows for a build event like this:

CD "$(SolutionDir)Tools\JurassicCoffee"
CALL JurassicCoffee.Console.exe "$(ProjectDir)Coffee" -c -o "$(ProjectDir)Content\coffee-js"