Makes node.contains(node) returns true

#99

#94

This updates the tests to use QUnit@2.x.x.

#92

See #83 for changes.

See #82 for changes.

This release has two fixes:

• Node.prototype.contains. This used to be on the Element, but any Node has contains.
• Deduplication of event handlers. If the same listener isaddEventListener'd multiple times it should only be added once.

• Add a cycle detection script to test process #77
• Hide docs that can’t show up in the navigation #79
• Lift contains method into Node #80

v1.3.0...v1.3.1

1.3.0 updates can-simple-dom to support the textContent as a getter/setter on the Element prototype. This will create a TextNode as the only child node to the element.

#25