Replaced repeated conf.get by beans variable.
Adding support for a robots.txt file.
Better use a proper file instead of a Jade mockup... + the rules are now the way we want them.
Merge commit '8f5bcc1b262dbc202725639a22052f5bb1c44c43' into robots
Merge pull request #388 from NicoleRauch/robots

Added robots.txt