fixed error in intro
fixed up rosetta__Factorial
added rosettacode-examples.txt with all the RosettaCode.org examples in one file
little changes
started work to fix closures
started work on fixing closures
all symbol maps are now immutable
closures seem to have been fixed
RosettaCode Hailstone Sequence code no longer works
fixed error in stream constructor code
bumped version to 0.9