Added a handful of tests, and fixed a handful of bugs (mostly making incremental progress in the parser, which is to be expected).
The Parser is still nice and modular and easily modifiable/extensible, I was just lazy when I wrote the first iteration so additional featues trickle in slowly, but its getting robuster.
In particular, I enabled ExplicitTuples to parse complex datatypes like lists and tuples and enabled preLex to tokenize floates as a single token.
Also made load a bit nicer.