[PIO-175] Elasticsearch 1 deprecated in 0.14.0 (#480)

Author: shimamoto

docs/manual/source/install/index.html.md.erb

@@ -41,8 +41,8 @@ or
 * Apache HBase 0.98.5
 * Elasticsearch 1.7.6
 
-WARNING: **Note that support for Scala 2.10 and Spark 1.6.x has been dropped in PredictionIO 0.14.0.
-They are no longer supported.**
+WARNING: **Note that support for Scala 2.10 and Spark 1.6 were removed as of PredictionIO 0.14.0.
+Note that support for Elasticsearch 1 is deprecated as of PredictionIO 0.14.0.**
 
 If you are running on a single machine, we recommend a minimum of 2GB memory.
 

docs/manual/source/install/install-sourcecode.html.md.erb

@@ -136,10 +136,10 @@ Starting from version 0.11.0, PredictionIO can be built against different
 versions of dependencies. As of writing, one could build PredictionIO against
 these different dependencies:
 
-* Scala 2.10.x(deprecated), 2.11.x
-* Spark 1.6.x(deprecated), 2.0.x, 2.1.x
+* 2.11.x
+* 2.0.x, 2.1.x, 2.2.x, 2.3.x
 * Hadoop 2.6.x, 2.7.x
-* Elasticsearch 1.7.x, 5.x
+* Elasticsearch 1.7.x(deprecated), 5.x
 
 As an example, if you want to build PredictionIO to support Scala 2.11.8,
 Spark 2.1.0, and Elasticsearch 5.3.0, you can do