Cleaning up
New RTFD.org theme
Remove obsolate files
Updated readme
Use RTD theme for docs
Updated exampleci
exampleci should work
Configured cache and loggers
requirements update
Show doc index file path while generating docs
Use 'we' form at documentation
Updated docs on configuration and integration
Fixed import error while trying to test without full module path
Started working on 'zci prepare' command
Use Python3's venv
zci 'prepare' command
Use full virtualenv

Python 3's venv module doesn't install distribute
or pip so it's easier to do it through original
virtualenv.
CLI docs updated
Updated cli module