Add gitignore
Add pip requirements
Make it a package
Split collector and exception into its own modules
Split renderers into its own modules
Whenever group_by=infrastructure is used, raise a ConnectorException
if a group is not found.
Just PEP8 changes
Merge pull request #1 from alvarolopez/split

Split
Merge branch 'master' of https://github.com/orviz/achus

Conflicts:
	reporter.py
Modify README's title.
Raise exception whenever a group mapping is not found, while grouping
by 'infrastructure'.
Update README's usage.