Update README.md
Update README.md
Update README.md
Update README.md
Modifying merging condition of gaussian estimators to allow for merging on top of empty estimator

Signed-off-by: Olivier Van Laere <vanlaere@yahoo-inc.com>
Adding observations of zeros

Signed-off-by: Olivier Van Laere <vanlaere@yahoo-inc.com>
Handling null cases

Signed-off-by: Olivier Van Laere <vanlaere@yahoo-inc.com>
Merge pull request #98 from ovlaere/counting-zeros

Counting zeros

Tested locally, passes mvn test. The TravisCI seems to have some problems with gradle.
add release notes
temporarily disable S4 build
Merge pull request #100 from gdfm/release_notes

add release notes
Merge pull request #101 from gdfm/disableS4

temporarily disable S4 build
add javadoc plugin