Zed is an abstract engine for text edition. It can be used to write text
editors, edition widgets, readlines, ... Zed uses Camomile to fully
support the Unicode specification, and implements an UTF-8 encoded string
type with validation, and a rope datastructure to achieve efficient
operations on large Unicode buffers. Zed also features a regular expression
search on ropes. To support efficient text edition capabilities,
Zed provides macro recording and cursor management facilities.