Add download links to packages required for building docs.
-rw-r--r-- 1996 BuildConfigConf.md
-rw-r--r-- 1273 BuildingDocs.md
-rw-r--r-- 2296 Home.md
-rw-r--r-- 9607 Installation.md
-rw-r--r-- 2862 TestingBuilds.md