web services.

It comprises of two parts: the first aims to make it easier to make requests
by providing a wrapper around libsoup, the second aids with XML parsing by
wrapping libxml2.

WWW: https://live.gnome.org/Librest

PR:		ports/178013
Submitted by:	Christoph Moench-Tegeder <cmt@burggraben.net>
Approved by:	culot (mentor)