Namespace fixes

For issue #7.

Removed my sloppy attempt at namespaces from Board.js and Directions.js.
Actually ran this stuff in the browser this time to see that the JS
loaded correctly. Everything is back to normal.

I'm keeping the file structure I've started, though.
Updating directory references

Updating the directory references to use the correct capitalization. It
was working fine without but it's better to be accurate.