pidgin/pidgin

Pull the purple_markup_* api out of util.[ch] to purplemarkup.[ch]. No code was changed just moved it from one file to the other.

Testing Done:
Compile and unit tests.

Reviewed at https://reviews.imfreedom.org/r/171/
.bad-ip {
color: @error_fg_color;
text-shadow: 0 1px @error_text_shadow;
background-image: none;
background-color: @error_bg_color;
}
.good-ip {
color: @question_fg_color;
text-shadow: 0 1px @question_text_shadow;
background-image: none;
background-color: @success_color;
}