Combine with aframe-altspace-component repo

[stevenvergenz]

This is a big one! These are the most significant changes:

• Combined the AltspaceSDK and aframe-altspace-component repositories into one.
• Ported the entire SDK codebase to the new ECMAScript 2015 syntax.
• New package build system based on ES2015 modules.
• Reformatted, cleaned, and improved documentation for both APIs.
• All JS behaviors are now classes, so the new keyword is required when instantiating them. This is reflected in the examples.
• All A-Frame components are classes in addition to registered components. They are accessible through the altspace.components namespace. They are not usable in JS as-is, but might be useful for third parties to replicate the functionality.
• Updated the official Three.js version recommendation to r84.

[stevenvergenz]

Wow, github's diff is basically useless here. Not that surprising, but unfortunate. Any ideas for review?

[brianpeiris]

Testing notes:

• Multiloader seems to be broken, so some of the examples are affected: chess, solar system, hats
• The Bob behavior seems to have different defaults? The Bob motion is a lot more exaggerated
• HoverScale seems to have broken
• Aframe tests are missing from the tests/index.html file (though maybe we should split them out into examples/aframe/tests and examples/js/tests?)

[brianpeiris]

Remember to add in the release notes that this update will include official support for three.js r84

[brianpeiris]

We should have the gulp script build a separate aframe-altspace-component.js library before we release. Maybe call it aframe-altspace.js since it really consists of mulitple components

[brianpeiris]

Hmm, we'll have to talk about that. Not sure how versioning/tagging/deploying would work with multiple output libraries.