downloader: allow specifying specific releases
pypi-install: support CLI specification of specific release
tests: test specification of specific release
pypi-install: support CLI specification to allow unsafe downloads
tests: test specification of unsafe downloads
tests: remove zope.site package which isn't on PyPI anymore
tests: disable test that fails on Ubuntu 12.04 due to external bug
tests: remove failing old twisted release
add Vagrantfile that builds .deb of stdeb, installs it, and runs tests
bdist_deb: get dist_dir option passed to sdist_dsc command
refactor py2dsc into python module and create py2dsc-deb script
bdist_deb: ignore temporary py2dsc directory
tests: test new py2dsc-deb command
tests: use bash automatic error handling
travis-ci: initial attempt to automate tests