Complex sentence: In early 2000 Arno Hollosi contributed a second database library to run PhpWiki on MySQL; from then on the features and contributions started to pile up, including a templating system, color diffs, rewrites of the rendering engine and much more.
Split into simpler sentences: In early 2000 Arno Hollosi contributed a second database library to run PhpWiki on MySQL. From then on the features and contributions started to grow, including a templating system, color diffs, rewrites of the rendering engine and much more.