initial commit for hi-lock.el

This hi-lock.el is from bzr revno 116727.
gunzipped in master so a diff can be created
deleting hi-lock to add it again, this time not gzipped
starting with hi-lock.el from bzr revno 116727
extension added to optionally keep highlighting-patterns in a separate file
Since I somehow don`t get a diff out of this, I`m adding the original
version to run diff -u on the old and the new one.
fixed docstring