* doc/descriptions/microtek.desc: Updated version number.
* backend/microtek.c:
Fixed bug in sane_read() [had failed to set return length to zero
in non-STATUS_GOOD conditions].
Fixed bug in sane_set_io_mode() [had returned SANE_STATUS_UNSUPPORTED
if blocking mode was requested].
Bumped version up to 0.13.1.
Updated (status keywords, mostly).
* backend/microtek.c:
* backend/microtek.h:
Replaced fprintf()/printf() with various DBG() statements.
Removed #include <stdio.h>!
Eliminated a few "unused parameter" compiler warnings.
Updated the copyright date.
Bumped version up to lucky 0.13.0