Testing mode

[usp_display_posts]                           : default displays all submitted posts by all authors
[usp_display_posts userid="1"]                : displays all submitted posts by registered user with ID = 1
[usp_display_posts userid="Pat Smith"]        : displays all submitted posts by author name "Pat Smith"
[usp_display_posts userid="all"]              : displays all submitted posts by all users/authors
[usp_display_posts userid="all" numposts="5"] : limit to 5 posts from all users