Initial commit. Pulled in jsrinth and compat for project.

Tileset is from http://opengameart.org/users/jerom
Added build scripts.

To build, run build.sh... To setup a watcher that will build whenever
a relevant file changes, run bgbuild.sh

These build files rely on linux-ish tools.
Finished tweaking with the build scripts.
First initial version.

A labyrinth with the given tileset is being displayed on the screen.
Fixes bug on build.sh
app.js shouldn't be tracked.
Mrge branch 'master' of https://github.com/phao/retroscape
Minor .gitignore issue