adds aside documentation

Author: cameronnorman

docs/components/aside.md

@@ -0,0 +1,31 @@
+# matestack core component: Aside
+
+Show [specs](/spec/usage/components/aside_spec.rb)
+
+The HTML `<aside>` tag implemented in ruby.
+
+## Parameters
+
+This component can take 2 optional configuration params and optional content.
+
+#### # id (optional)
+Expects a string with all ids the p should have.
+
+#### # class (optional)
+Expects a string with all classes the p should have.
+
+## Example 1
+
+```ruby
+aside id: "foo", class: "bar" do
+  paragraph text: "This is some text"
+end
+```
+
+returns
+
+```html
+<aside id="foo" class="bar">
+  <p>This is some text</p>
+</aside>
+```