A tracking issue for the current state of the POC

[AlvinKuruvilla]

1. For expediency's sake, it should be assumed that everything on and not on this list needs to be thoroughly tested.
2. Counters: Most methods are "done" but need lots of verification
3. Encoder: Rudimentary (missing functionality)
4. FSSTEncoder: Most functions are "done" but there are some incompletes and TODOs left
5. Decoder: Rudimentary (missing functionality)
6. FSSTDecoder: Rudimentary and missing functionality
7. Symbol: Rudimentary and missing functionality
8. QSymbol: Rudimentary and missing functionality
9. SymbolTable: Most functions are "done" but there are some incompletes and TODOs left Rudimentary and missing functionality