disable problematic tests on linux
disable more problematic tests for linux
fixes #27
added PLC Stop command
flake8

issue 20
plc start added
Merge pull request #32 from mateuszk87/master

added PLC Stop command
Merge pull request #31 from spreeker/master

should fix issue #29
tests for stop, cold_start hot_start PLC in client
start fake server from within test suite
Merge branch 'master' into travis-mac

Conflicts:
	.travis.yml
	run_tests.sh