Began writing multiprocessing code
Made parser create separate tokenizers so process aren't sharing data
Began writing recombination code, fixed misc. issues
Added reconversion for columns containing strings
Fixed problems with raising exceptions in parsing processes
Added data_end handling
Switched to fread()ing file chunks for each process
Added file tests, fixed problems with file reading
Implemented parallel parameter, fixed tests and custom header handling
Made convert_str use list instead of ndarray to fix unicode issues
Implemented memory mapping
Fixed line-by-line input in header and Windows line endings
Added parameter use_fast_converter to use xstrod
Switched to memory mapping wherever applicable
Began writing Windows memory mapping code
Fixed Windows issues with multiprocessing/memory mapping
Made parser share memmap char * pointer across processes
Made converters avoid char* to bytes conversion for fill_values check when possible
Merged multiprocessing branch