* Fixing the portfolio grid layout, and make it as inline-block which will adapt automatically inside of the wrapper corresponding to the wrappers width.
* Adding width attribute to the shortcode, so users can change the width according to their needs.

git-svn-id: https://plugins.svn.wordpress.org/waving-portfolio/trunk@882595 b8457f37-d9ea-0310-8a92-e5e31aec5664