The asset URI can reference a decal or image uploaded to Roblox. It functions identically to Decal.Texture with regards to loading the image. The rendered image will be colorized using ImageButton.ImageColor3. It is possible to make the image render as tiled, scaled to fit, or 9-sliced, ...
MediaWiki is the software used for Wikipedia http://www.wikipedia.org/ and the other Wikimedia Foundation websites. Compared to other wikis, it has an excellent range of features and support for high-traffic websites using multiple servers (Wikimedia sites peak in the 100K+ requests per second...