Revert "app.py: Converts input URLs to strings."

This reverts commit d1992463d2bd566b2f6f0b30dc8c386a24eef28f.
options.py: Decodes arguments before processing.
Adds lib3to2 as a Python 2 requirement.
Fixes syntax error in travis config.
Merge branch 'topic/improve_requirements' into develop
readme.rst: Fixes link formatting.
Merge branch 'develop'
Bumps version to 0.10.2.