Peter M. Groen / libmodbus

Fix for #542

This patch has been developed by Andrey Skvortsov, Michael Heimpold
and Stéphane Raimbault.

- avoid bash'isms and use of GNU find
- terminate server after test run (ignored in TCP mode)
- add *.log, *.trs to .gitignore
- unit-test-client returns 0 on success
- save exit code of unit-test-client for make check status
- replace kill by killall
- add entry in README

Add top build directory to tests. Otherwise modbus-version.h
won't be found during the build process.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

- depends of automake 1.11
- C99
- pic-only
- more warning C flags
- remove obscure checks
- don't print directories
- add libmodbus.pc to clean files
- remove -Werror

This reverts commit df0cf7927249954f15e0aa85b02d21b990fa9af9.
Use <modbus.h> in tests.

Inspired by the Clutter project and work done by Florian Forster.

This time the change is definitive :)

- 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

- 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

- 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

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

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

- Separate unit-test-master and test-master-random

- separate tests directory
- regroup modbus.h and modbus.c in the same dir
- updated waf scripts
- updated autotools files
- bump application version to 1.9.0
- bump library number to 2.0.0

- move modbus.h => include/modbus/
- create a pkgconfig file (module.pc)
- install modbus.h in $(includedir)
- new path to reach modbus.h

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