Merge pull request #64 from jiayuasu/master

Update README and renew the license

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Mohamed Sarwat
+Copyright (c) 2015-2017 Arizona State University Data Systems Lab (http://www.datasyslab.org)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -20,9 +20,11 @@ GeoSpark artifacts are hosted in Maven Central: [**Maven Central Coordinates**](
 
 |      Version     	| Summary                                                                                                                                                                                                               	|
 |:----------------:	|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------	|
+|0.5.2| **Bug fix:** Fix [Issue #58](https://github.com/DataSystemsLab/GeoSpark/issues/58) and [Issue #60](https://github.com/DataSystemsLab/GeoSpark/issues/60); **Performance enhancement:**: (1) Deprecate all old Spatial RDD constructors. See the JavaDoc [here](http://www.public.asu.edu/~jiayu2/geospark/javadoc/0.5.2/). (2) Recommend the new SRDD constructors which take an additional RDD storage level and automatically cache rawSpatialRDD to accelerate internal SRDD analyze step|
 |0.5.1| **Bug fix:** (1) GeoSpark: Fix inaccurate KNN result when K is large (2) GeoSpark: Replace incompatible Spark API call [Issue #55](https://github.com/DataSystemsLab/GeoSpark/issues/55); (3) Babylon: Remove JPG output format temporarily due to the lack of OpenJDK support|
 | 0.5.0| **Major updates:** We are pleased to announce the initial version of [Babylon](https://github.com/DataSystemsLab/GeoSpark/tree/master/src/main/java/org/datasyslab/babylon) a large-scale in-memory geospatial visualization system extending GeoSpark. Babylon and GeoSpark are integrated together. You can just import GeoSpark and enjoy! More details are available here: [Babylon GeoSpatial Visualization](https://github.com/DataSystemsLab/GeoSpark/tree/master/src/main/java/org/datasyslab/babylon)|
 
+
 # Important features ([more](https://github.com/DataSystemsLab/GeoSpark/wiki/GeoSpark-Important-Features))
 ## Spatial Resilient Distributed Datasets (SRDDs)
 Supported Spatial RDDs: PointRDD, RectangleRDD, PolygonRDD, LineStringRDD