General utilities

This is a set of closely related utilities.

title	description
immutablelist	toolbox for lazy list manipulation, for generating and manipulating very large or even infinite large lists. The core function is random access getter get(N) with N a BigInteger
files	toolbox for file handling: listen for file changes
Listener	similar to the java Observable, but with interface foundation
Tree	utility for tree-with-attributes, matching of trees, etc
Repository	Interface and basics for building a repository of class objects with change notification