Bump to v1.2.1

* Tweak: Performance tweaks for Google Maps
* Tweak: Twitter widget, fixed an issue with page break when tweets are
not retrieved
* Tweak: Added custom post type menu positions and icons
* Tweak: Disable scroll wheel zoom on Google Map
* Tweak: Add default options for portfolio and skills slugs
* Improved - Added inline docs for Portfolio post type
* Improved - Make skill terms filter portfolio items based on skills
when clicked
* Fix - Added missing zoom parameter in Google Maps shortcode
* Fix - Custom post type's visibilities
* Fix - Add *google-map* class on Google maps shortcode
* Fix - Fix Team post type title