Split tokenizer into base class and subclass
Add Literal to BaseTokenizer token type enum
Separated Parser into base and subclass
Moved Parser/Tokenizer base classes into Input namespace
Generalize whitespace code in tokenizer
Added string concatenation
Added string coercion for ints and bools
Add constant propagation for string values
Bug fixes to procedure calls and offset calculations
Added type coercion on print, call, and return statements
Added HllParser/Tokenizer classes which were mistakenly left behind
Added assembler
Changed tokenizers to take in istreams instead of filenames
Converted CodeGenerator to emit assembly code
Added symbol references and program linker
Added load/store byte