Several improvements to handle the changes in the HTML rendering of pandas dataframes in pandas 0.11
Small fix to ensure backward compatibility for panda 0.10.0 and changed default behaviour to monkeypatch the DataFrame class itself. The molecules will now be rendered as images in all newly generated dataframes (can be reverted)
Merge pull request #49 from nhfechner/master

PandasTools compatibility patch for pandas version 0.11.0