fix proxy support
deal with travis installing ssl backport by default
windows wheel test fix
switch to an unbroken bitbucket project for tests
explicitly require virtualenv>=1.9.1 for travis
remove unnecessary markerlib installs in wheel tests
Fix issue #32: pip crashes when server does not send content-type header

Thanks Kelsey Hightower for pointing what to change.
Decode downloaded contents.

Also add a test (the exact url depends on pulling a change to pip-test-package).
Change test to use set() comparison and add docstring

Using set because and os.listdir() does not guarantee ordering.
Change test_requirements:test_remote_reqs to use hltbra's gist

g2p's pull request for issue #760 requires changes on pip-test-package.
The gist was created to remove this dependency.
Move python3/python2 details from ``download.get_file_content`` to backwardcompat module
Merge pull request #872 from hltbra/issue-32

Fix issue #32: pip crashes when server does not send content-type header
Tweak variable name at backwardcompat.get_http_message_param (python 2 version)
update changelog
update usage patterns for 'pip wheel'
check for proper distribute when using wheels
spurious file
wheel requirement checks with tests
Merge pull request #885 from qwcode/distribute_check

wheel requirements checks with tests
another 'pip freeze' example