Move infrequently used tools out of top level

Reduce the clutter in the top level directory.
Also, correct the port in the add-data.sh script
Add MIT licence
Make backdrop an installable package.
Move statsd into a separate module

Avoids dependency on statsd when installing.
Fix setup.py

Import all packages rather than just the top level.
Fix indenting.
Make sure the README.md and requirements.txt are available in the source
package.
Fix statsd test

It was moved into it's own module called monitoring.
PEP8