CFY-448 print output after polling for return code
CFY-449 poll for status before logging and readline instead of read
CFY-449 added logging api for scripts
CFY-449 stderr should also be logger as error
CFY-449 strip redundant logging level
CFY-449 fix flake
Merge pull request #4 from CloudifySource/feature/CFY-449-bash-improvements

Feature/cfy 449 bash improvements
Merge branch 'develop' into feature/CFY-448-node-properties-unicode

Conflicts:
	bash_runner/tests/test_bash_runner.py