Revert "Enforced SSL protocol SSLv3 in httplib2 and urllib2"

This reverts commit 00f70229ae2f09cbbb221836363e9cb0daf2cd35.
Prefer TLSv1 and fallback to SSLv23.
SSLv3 was removed due to security issues.
Merge branch 'master' of https://github.com/slipstream/SlipStreamClient