Merge pull request #9 from zoloft/master

Fixed IE base href bug
Fixing issue https://github.com/travist/jsencrypt/issues/11 as discussed.
Merge pull request #13 from shing19m/master

Fixing issue https://github.com/travist/jsencrypt/issues/11 as discussed...
IE Compatibility fix - IE doesn't support add/remove EventListener, replaced with add/detach Event