Release v1.7.6

See the Tutorial.pdf for detailed information on obtaining, using and extending MEKA.
For a list of included methods and 'quick-start' command line examples,
see: http://meka.sourceforge.net/methods.html

Release Notes, Version 1.7.6

This is a minor release, fixing a few minor issues.

- Updateable classifiers are now moved to subfolders incremental/ and incremental/meta
- Updateable classifiers are now set with a sensible default classifier (HoeffdingTree), and BRUpdateable in the case of meta incremental classifiers
- Javadoc comments are cleaned up
- Some unused branches of weka/ and moa/ were removed
- Some overly stringent unit tests were changed
- Recent changes are reflected in the tutorial