Adds setup scripts (setup.py, reqs, Vagrantfile)
Adds vistrails.tests.__main__

This allows using "python -m vistrails.tests" to run the unit tests.
Discovers the packages to install
Adds the package data
Makes runtestsuite's atexit function safer
Don't run thumbnail comparisons without examples/
Fixes import override tests
Removes ctypes from dependencies

It is part of the standard library on 2.6 and 2.7, and the package is a
pain to install (C module, externally hosted).
Converts long_description to rst format
Adds LICENSE file
Merge branch 'v2.1' into 'deployment/v2.1'
Bumps version to v2.1.3
Merge branch 'v2.1' into 'deployment/v2.1'
Bumps version to v2.1.4
Adds a 64bit machine to the Vagrantfile
Merge branch 'v2.1' into 'deployment/v2.1'
Adds conda recipe dist/conda/
Starts improving release procedure

The goal of this branch is to make it easier to build the release
binaries, and if possible completely automate that so buildbot can do
it.
Adds dist/pypi.sh to build sdist and wheel
Merge branch 'v2.1' into 'buildbot-nightly'