[RELEASE] Version 0.2.0

# Release Notes

SystemDS 0.2.0 is the second release under the new name after forking from SystemML.
This release has seen a wealth of little fixes here and there to accomodate some the major
features which extend the functionality of this system.

Changes in this release include

* Initial **federated tensors** where special instructions push down as much computation as possible to remote workers.
* **Python bindings** bridge the gap to make SystemDS available to a greater audience that
already has experience or existing code in Python. Initial functionality is there for matrix operations, federated tensors and lineage traces
* A first version of multiple imputations with an implementation of multivariate imputation
by chained equations **(MICE)** and support for outlier detection using standard deviation and
inter-quartile range
* GPU accelerated cumulative aggregate operations
* Porting over compressed matrices from SystemML
* More builtin functions

## Acknowledgements
Thanks to the whole [DAMSLab](http://damslab.github.io) team and several external
[contributors](https://github.com/tugraz-isds/systemds/graphs/contributors)
for their support in the creation of the release of SystemDS 0.2.0.

pom.xml

@@ -29,7 +29,7 @@
 		<version>18</version>
 	</parent>
 	<groupId>org.tugraz.sysds</groupId>
-	<version>0.2.0-SNAPSHOT</version>
+	<version>0.2.0</version>
 	<artifactId>systemds</artifactId>
 	<packaging>jar</packaging>
 	<name>SystemDS</name>