v2.1 - Improved Datatype Tolerance
Adding more tolerance for unknown or future datatypes. The parser can optionally continue with the data it knows, skipping the data it is not equipped to handle. When recursing the GPMF payload using GPMF_Next(), use the option flag GPMF_TOLERANT. If not, the GPMF_Next() will return a new error code GPMF_ERROR_UNKNOWN_TYPE if an unhandled data type is found.
This version has improved error reported for a wider range of potential bitsteam corruption.