😸 add .github, move contributing

Author: desandro

contributing.md .github/contributing.md

@@ -4,6 +4,15 @@
 
 All bug reports and problem issues require a [**reduced test case**](http://css-tricks.com/reduced-test-cases/). Create one by forking any one of the [CodePen examples](http://codepen.io/desandro/pens/tags/?grid_type=list&selected_tag=packery-docs) from [the docs](http://packery.metafizzy.co).
 
+**CodePens**
+
++ [Basic layout](http://codepen.io/desandro/pen/QyrEgX)
++ [Fluid layout](http://codepen.io/desandro/pen/xZjOXq)
++ [Images](http://codepen.io/desandro/pen/pgVbLv)
++ [Draggable](http://codepen.io/desandro/pen/aGvIq)
+
+**Test cases**
+
 + A reduced test case clearly demonstrates the bug or issue.
 + It contains the bare minimum HTML, CSS, and JavaScript required to demonstrate the bug.
 + A link to your production site is **not** a reduced test case.

.github/issue_template.md

@@ -0,0 +1,3 @@
+<!-- Thanks for submitting an issue! All bug reports and problem issues require a **reduced test case**. Create one by forking any one of the CodePen examples from the docs. See guidelines link above. -->
+
+**Test case:** http://codepen.io/desandro/pen/QyrEgX