build a fileloader

[RolandJansen]

file loading is stripped from the Sound (now DemoSampler) class because it is a dedicated task. There should be an intermix component for this as it will be needed in many subsystems in the future (for audio-, project- and preset-files).

See: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API https://www.html5rocks.com/en/tutorials/file/dndfiles/

[RolandJansen]

Public API should have functions for different file types:

• LoadBinaryFile
• LoadTextFile
• LoadAudioFile
• LoadYouNameItFile

[RolandJansen]

not needed in v0.5.0

[RolandJansen]

a fileloader makes sense when plugins can be loaded -> switched to v0.7.0

[RolandJansen]

How to load js code at runtime:

• https://stackoverflow.com/questions/9037082/how-to-load-javascript-code-to-an-html-file-at-runtime
• https://stackoverflow.com/questions/14521108/dynamically-load-js-inside-js
• https://stackoverflow.com/questions/950087/how-do-i-include-a-javascript-file-in-another-javascript-file

[RolandJansen]

worker, plugins and scripts can be loaded from client and server. Last thing is to load javascript from a string. That should do it.

[RolandJansen]

loading js from string is probably not the best idea. There is a follow-up ticket #161 to load/save json instead.