Use pbr to simplify packaging
Fix setup.py to include config_default.yaml
tesseract: Workaround for missing "--list-langs" option
Merge branch 'pbr'

Conflicts:
	setup.py
Use pbr for packaging
tesseract: Better alternative method for obtaining available languages
tesseract: Replace ProcessPoolExecutor with list of Popened processes
Switch to ASCII-char for marking selected plugins
Release 0.4.2