Code is licensed under the MPLv2. Changed the makefile to, by
default, optimize to level 3. make debug will remove optimization
and add gdb debugging symbols, which slows output down quite
a bit. Removed an assertion leftover from bug squashing.
I totally brainfarted and put this->preDigits.size() in the for
loop comparison clause, which gets re-evaluated every loop.
So it was leaving digits on the stack that should have been
printed, causing errors both immediately and down the line.
