Discuss / fix: custom components naming (dash, case-mixing)

[PK1A]

This is an issue based on the comment in #245. The basic problem here is a fundamental mismatch between HTML syntax for tags / attributes and JS syntax for variables / object properties:

• HTML - case-insensitive, doesn't allow spaces, allow dashes in names

• JS - case-sensitive, one has great flexibility in naming properties of objects, somehow more restricted in naming variables.

  Since the custom components are JavaScript variables / object properties and custom component invocation look a lot like HTML tags we need to makes those 2 worlds to co-exist somehow.

The particular issue to be fixed in this issue is to allow components with a dash in their name (ex.: <#foo-bar />) but I think a more general thought about naming of custom components and their attributes would be in order.