Improve Installation documentation
On this website http://pandas.pydata.org/pandas-docs/stable/install.html there are the console commands to install pandas on for example debian.
They are listed as _sudo apt-get install python-pandas_.
It would be a good idea to mention, that this will install pandas for python2 and you need to specificly write _python3-pandas_ to get the version for python3.
This might probably be completely obvious to everyone installing stuff like this every day, but for a beginner like me it was not clear at all and I struggled for quite some time to get pandas for py3.
Thank you.
