Make AssemblyScript empty project empty again

[munrocket]

Empty AS project looks too complicated for an empty project. I suggest to rename it to hello world in AS and create a new one where all files from assembly folder moved to src and without js calling from wasm in order to create this empty example more similar to another.

By the way, right now it now working at all. Because this PR #436 not merged. Please give little love to AssemblyScript.