Organize sky/framework a bit

sky/framework/README.md

-SkyElement
-===
-
-SkyElement is the framework for creating...yup...Sky Elements. It take heavy
-inspriation from [Polymer](www.polymer-project.org) and isn't very fully
-featured...yet
-
-Declaring an element
---------
-```HTML
-<import src="../path/to/sky-element.sky" as="SkyElement" />
-<template>
-  <my-other-element>Hello, {{ place }}</my-other-element>
-</template>
-<script>
-// SkyElement takes a single object as it's only parameter
-SkyElement({
-  name: 'my-element', // required. The element's tag-name
-  attached: function() {
-    this.place = 'World';
-  }, // optional
-  detached: function() {}, // optional
-  attributeChanged: function(attrName, newValue, oldValue) {} // optional
-});
-</script>
-```
-
-Note that an element's declared ShadowDOM is the previous `<template>`
-element to the `<script>` element which defines the element.
-
-Databinding
---------
-SkyElement's databinding support is derived from Polymer's. At the moment,
-there are some key differences:
-
-There is not yet support for
- * Declarative event handlers
- * Inline expressions
- * Self-observation (e.g. `fooChanged()` gets invoked when `this.foo` is changed)
- * Computed properties (e.g. the computed block)
- * Conditional attributes (e.g. `<my-foo checked?="{{ val }}"`)
-
- Also, because there are so few built-in elements in Sky, the default behavior
- of HTMLElement with bindings is to assign to the property. e.g.
-
- ```HTML
- <my-foo bar="{{ bas }}">
- ```
-
- Will not `setAttribute` on the `my-foo`, instead it will assign to the `bar`
- property of `my-foo`. There are two exceptions to this: `class` & `style` --
- those still`setAttribute`.