Q3BSP relies on the sort order
Read() should return number of elements read, not count of bytes
Read() should clip to the file size and return elements actually read,
instead of aborting if try to read too much
Moved IOSystem Unzip functionality out of D3MF Importer into include/assimp
Cleaned up and more efficient:
Don't map the archive until the caller opens a file or requests the contents list
Don't extract any files until they are opened
Store the location of the data within the ZIP and extract it later if the file is opened.
RichardTea