Replace the hard coded paths in the cheat sheet "Sample CDK scripts".

js.executeFile() can not open JS stored in an array, so a quick fix was
to make hard coded links in the cheat sheet. The new method js.execute()
can handle this and this commit make the cheat sheet use of that.
Merge pull request #19 from KlasJoenssson/Bug3427

Replace the hard coded paths in the cheat sheet "Sample CDK scripts".