Post 0.4 work needed

[hartym]

• Allow to run directories or modules using "bonobo run": tests, docs.
• Bonobo version command now shows where the package is installed, and an optional "--all/-a" flag show all extensions in the same way: tests, doc ([cli] "bonobo version" should show where is the source #81)
• Bonobo run flag "--install/-I" allow to pip install a requirements.txt file if run targets a directory: tests, docs ([cli] Option to check for dependencies on bonobo run ? #71)
• New PrettyPrinter and deprecate old crappy modules: More dev, tests, doc, deprecate old.