Initial release

Fully rewrote the parser and tokenizer.
Integrated toml-test project.
Made most valid tests pass.
Fixed crashes & hangs that were detected by the tests.
Made the library significantly faster.

There is still more work to do:

1. destroy_table() that frees all the memory. should be in v1.1.0.
2. rewriting the validator and passing all of the invalid tests.
3. making multiline string line escaping work by the spec.