Merge pull request #4630 from dillenberger/master

added pepperl_fuchs to documentation index for hydro
Add python-simplejson dep for Fedora
Merge pull request #4631 from cottsay/simplejson-fix

Add python-simplejson dep for Fedora
Add Fedora dep for python-sklearn
Merge pull request #4632 from cottsay/sklearn-fix

Add Fedora dep for python-sklearn
Adding pepperl_fuchs to documentation index for groovy and indigo