Changelog for release 0.0.4.2-alpha (12/23/2014)

This release focuses mostly on bug fixing and new features.

• A first version of the generic features library is now available as part of ddlib, the utility library included in DeepDive.
• The spouse_example example and the application walkthrough were expanded to cover the use of MindTagger and of the generic features library.
• The --reg_param <regularizationParameter> option was added to the DimmWitted sampler to specify the desired value for the l2 regularization parameter used in learning.
• Some internal details of the implementations of the factor graph grounding have been changed to avoid changing the schema of user-defined tables.
• MindTagger has been upgraded to fix a bug.
• A couple of typos in function names and log messages have been fixed.