Fixed some bugs (Showing / Hiding default images from configuration, formated date, ...)


Showing / Hiding default images from the smartblog configuration ("Show No Image" option).
Highlight featured posts (using sds_post_title_featured css class in smartblog css).
Formated date.
Read more highlighted.

![image](https://cloud.githubusercontent.com/assets/1809508/4199546/f2d9597e-3806-11e4-88d4-01fc77aad80a.png)