Grunt setup for creating production version under /build.

One still needs to manually configure index.html. Also duplicates of the audio and images folder needs to be put in
/build. Maybe there should be one testApp and one App for production. Then there could be a filter in Grunt to not
care about filenames starting with test*.js ?
Somewhat of a build system set up.

Placed javascript files only used for testing in test folder to not be included
in the production version. Still needs to find a nice  way to include the whole
/build folder on gh-pages before finishing #3. Grunt is great IMO.
Merge branch 'iss03'

Fixes #3 but the automated build process can still be improved.