reconsidered 0.9

Reconsidered adds a vital and sorely missed language feature to Ruby: the well known and widely loved GO TO operation, as discussed in Donald Knuth's seminal paper {<em>Structured Programming with <tt>go to</tt> Statements</em>} (see REFERENCES, below). However, this implementation is itself severely limited -- it only allows execution to jump to a point in the program which has already been passed during execution of the program; it is thus less general purpose a tool than the true GOTO of languages such as Fortran.