Handle ctrl/cmd/shift clicks on links correctly.

Such clicks shouldn't try to remain in the app, 
but instead should fall through to the browser default.
Merge pull request #49 from tmeasday/open-in-new-window

Handle ctrl/cmd/shift clicks on links correctly.
Release 1.3.5
Merge remote-tracking branch 'upstream/master' into ie-support

Conflicts:
	index.js