Ergonomics / Polish / Initial Experience "Punch List"

[wycats]

• [ ] Can't use async function out of the box due missing regeneratorRuntime (#55)
• [ ] Sourcemaps seem broken (#56)
• [ ] Integration with npm packages should be documented and/or improved (#57)
• [ ] Guides need a quick (optional) introduction to TypeScript and pointers to other resources. (glimmerjs/glimmer-website#65)
• [ ] Guides need to document args vs. attrs (and more generally, templates!) (glimmerjs/glimmer-website#66)
• [ ] Nested components are broken (https://github.com/glimmerjs/glimmer-application/issues/84)

This issue is not intended to supersede #54, which is largely focused on technical and internal issues.

[locks]

Added https://github.com/glimmerjs/glimmer-application/issues/84.

[locks]

Moved to https://github.com/glimmerjs/glimmer-application/projects/1.