Replace `javascript:void(0)` with `#`

Fixes:
- issues with content security policy (#1215)
- onbeforeunload in IE (#403)

We don't need to add a preventDefault because all clicks on
.chzn-container already have a preventDefault
No href at all!
When choosing a result in single select mode, set the current value
to false (If it exists, of course).

Fixes #1391
Merge pull request #1392 from harvesthq/single-select-should-unset-current-value

Single select value fix
Indentation/whitespace fixes
Link to the actual license instead of the Wikipedia page
remove use of attr(), closes #334
remove href of <a />
use native dom element
enforce pointer cursor for links
Merge remote-tracking branch 'upstream/no-more-js-void' into remove-attr
Update copyright year.
Add footer to options page.
Merge pull request #1385 from koenpunt/remove-attr

Remove javascript:void and attr references
added Koen to package json and examples
Merge branch 'master' into indentation_and_footer
Add @koenpunt to the docs pages.
Merge pull request #1397 from harvesthq/indentation_and_footer

Update copyright and license link
added @koenpunt to package.json
Merge branch 'master' into koenpunt-update-maintainers

Conflicts:
	public/index.html
	public/index.proto.html