Log Message:
Update to 0.3.0.  Changes:

     * PMarc -pm1- archives that contain truncated compressed data (the
       decompressed length is longer than what can be read from the
       compressed data) now decompress as intended. Certain archives
       in the wild make the assumption that this can be done.
     * LArc -lz5- archives that make use of the initial history buffer
       now decompress correctly.