2.2.0

• Slightly incompatible API changes. Read this.
• New approach to binding keys, support for custom bindings.
• Support for overwrite (insert).
• Custom-width and stylable tabs.
• Moved more code into add-on scripts.
• Support for sane vertical cursor movement in wrapped lines.
• More reliable handling of editing marked text.
• Add minimal emacs and vim bindings.
• Rename coordsFromIndex to posFromIndex, add indexFromPos method.