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/
REVIEWBOARD_URL = "https://reviews.imfreedom.org/"
REPOSITORY = "pidgin/pidgin"
REPOSITORY_TYPE = "mercurial"
LAND_DEST_BRANCH = "default"
LAND_PUSH = False