Fix Pip/Setup.py installation and clean up requirements.

We can support newer versions of Tornado and Boto, so allow them. Also
remove unused dependencies on things like tornadomail. Lastly, point to
a patched version of the python-rightscale library that finally installs
correctly via Pip.
Set Version string properly
Import nose later in the setup.py
test
Revert "test"

This reverts commit 6c80dd7e2ba3e1e4fb155c8e8cd7456cc7eb5171.
Document how to install Kingpin via GitHub or Pip
Remove unnecessary python setup.py install from make build step.
Fix broken group.BaseGroupActor execute tests
How to setup your dev environment docs
typo
bad doc
Prevent running integration tests in Tornado 4.
Merge pull request #77 from Nextdoor/fix_requirements

Clean up dependencies, requirements installation and installation via PIP.