Add MS14-012 Internet Explorer Use-After-Free Exploit Module

Add MS14-012 IE UAF.
Add support for specific builds of MSIE 9 on Win 7 SP1

These IE9 versions are vulnerable to MS14-012 (see #3120). If we don't
add them, then os_detect might recognize the target as IE 8, and fail.
Update CVE
Fix typo
Land #3120, @wchen-r7's exploit for CVE-2014-0307
Land #3124, @wchen-r7's new checks for os.js