Version 5.1.1

This is a minor bugfix release.

1. Previously, if rsmpredict was given a model requiring a transformation that could yield Inf/NaN values for new data (e.g. sqrt(-1)), it would raise an error and terminate. Now, it simply excludes such responses and displays a warning.
2. Updated various conda files to use newer versions of the ipython and notebook packages since there seem to have been some updates that broke older recipes and requirements files.