0.2.0a9

Changes in 0.2.0a9

Changed:

• URL regexes should be more faithful to GitHub's actual restrictions
  • Neither usernames nor repo names can contain underscore (_), so we
    shouldn't accept it
  • Repo names can contain dot (.), which the old regex didn't allow
  • Usernames have a maximum length, which we are now looking for

Fixed:

• Unnecessary parentheses added in previous alpha release
  • Apparently, pip install --upgrade --pre can install the wrong release,
    making one's testing unreliable.