Allowing for link clicks to trigger a `window.open` call to target `_blank`. Currently, clicking a link simply puts the editor into `isFirstResponder`, which is not consistent with user expectation.
Integrating feedback from the PR, primarily to rely on `preventDefault` and SC.Event
Merge pull request #24 from iParadigms/team/mysterlune/anchor_link_click

Allows for link clicks to trigger when editor is not first responder