Fixed company name
qmodbus.pro: replaced wsock32 with ws2_32 library

Thanks to Christian Waldmann for pointing out this issue.
SerialSettingsWidget: improved port opening on Win32

It's now possible to open com ports with numbers > 9.

Thanks to Christian Waldmann for the patch.
libmodbus: updated up to commit 457be540a240f9a6747a2eed886cf5bc67eabcb0

Updated libmodbus up to commit 457be540a240f9a6747a2eed886cf5bc67eabcb0.
BatchProcessor, MainWindow: adapted libmodbus API changes
libmodbus: do not define ENOTCONN anymore

It's now defined in MinGW headers.
libmodbus: updated modbus-version.h with upstream version