* corrupt files in archives now generate an error
* archive files ending in "/" will not be tested for crc - skip path entries
* add new flag FILE_OPEN_NO_PRELOAD to skip decompressing on open
This is used in audit.c, which only tests whether files exist
* added error checking to all calls to load_file_zipped
- removed years from copyright notices
- removed redundant (c) from copyright notices
- updated "the MAME Team" to be "Nicola Salmoria and the MAME Team"