Integrate with oslo

Use base packages:
1) cliutils - we will use it for cli application
2) oslo.config - it is used as dependency injecton
and also contains some code related to cli app
3) gettextutils - translations
4) importutils - dynmical imports
5) jsonutils - we will use it for validations and such things
6) log - for logging
7) timeutils - will be 100% used somewhere
Rename README.md to README.rst
Add tox, pep and requirements to project

Adding minimal amount of things to be able to run
tox against code and check all unit tests + pep
Add AUTHORS file
Add rally.sample.conf to project

To use ./tools/config/generate_sample.sh I have to add 3 more requirements:
Babel, netaddr, iso8601

Adding new directory etc to store all configurations.

And as a first configuration added etc/rally/rally.sample.conf

Fix small bug rally is package => must have __init__.py file