Peter M. Groen / libmodbus

- the return value is used to pass the message length
- remove the hack on exception check in modbus receive
- update tests

- simpler wscript_build files
- reuse VERSION
- add path to config.h

- adjusts various comments on return values
- updated tests
- added entry to MIGRATION

- new function modbus_flush
- new names and values for error defines
- finer recovery on error
- merge TOO_MANY_DATA and INVALID_DATA
- stop unit-test-master at the first error
- FLUSH_OR_RECONNECT_ON_ERROR -> FLUSH_OR_CONNECT_ON_ERROR
- more precise tests in unit-test-master

- MAJOR changes to the API (see MIGRATION)
- New unit tests
- Removed TODO list
- Updated NEWS & MIGRATION files

This change improves the conformance with the PDU and ADU definitions of the
Modbus protocol and reduces the number of additions.

- upgrade to WAF 1.5.3
- smaller WAF scripts
- fix using of modbus.h with WAF
- updated configure.ac and Makefile.am files
- change include paths in test files

- use milliseconds instead of microseconds
- increase the number of loops to 100 000 from 10 000

- new functions modbus_slave_init_listen_tcp, modbus_slave_accept_tcp,
  modbus_slave_slave_receive.
- removed printf in modbus.c: 'Connection closed'
- new slave test, bandwith-slave-many-up
- updated build scripts
- updated MIGRATION document file

This new value isn't appropriate for a serial link.

- Add test files to examples directory in libmodbus-dev.
- Add MIGRATION file to libmodbus-dev.
- Define the compatibility level to 6.
- Add MIGRATION to EXTRA_DIST in Makefile.am
- Add README to  EXTRA_DIST in tests/Makefile.am
- Add unit-test.h as dependency in tests/Makefile.am

- The coil and registers are wrote by the master and not assigned by the
  slave anymore
- The data used to write are the ones in unit-test.h
- The read test is done after the write test

- rename test-master-random => random-test-master
- fix memset
- update README
- add the files to configure.ac and wscript

- s/datas/data/
- the warning is now an error
- add some checks in modbus.c
- add unit tests
- remove the TODO item
- minor 80 columns changes

The results are really interesting!
- bench-bandwidth-slave.c
- bench-bandwidth-master.c

It's slower to pass non aligned values.

- Reduce the max message length to 256 (PI_M300)
- s/size/length/

- add some unit tests
- add PRESET_MULTIPLE_REGISTERS support in manage_query()

- cleanups in offset/resp_length vars
- cleanups in comments
- add FORCE_MULTIPLE_COILS in manage_query

- Add some tests for force_single_coil