Libraries Added

Added the "world" library - encapsulates the idea of a world. Tick 5
onwards.
Added the "hashlife" library - faster implementation than any given
here, worlds can grow. Tick 7.
Added the "sounds" library - used to generate audio. Tick 5*.
Ticks 5*, 6* Skeletons

Tick 5* class created - No content.
Tick 6* classes cloned from Tick 6.