[SPARK-7556] [ML] [DOC] Add user guide for spark.ml Binarizer, including Scala, Java and Python examples
[SPARK-7556] [ML] [DOC] Add user guide for spark.ml Binarizer, including Scala, Java and Python examples

JIRA: https://issues.apache.org/jira/browse/SPARK-7556

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #6116 from viirya/binarizer_doc and squashes the following commits:

40cb677 [Liang-Chi Hsieh] Better print out.
5b7ef1d [Liang-Chi Hsieh] Make examples more clear.
1bf9c09 [Liang-Chi Hsieh] For comments.
6cf8cba [Liang-Chi Hsieh] Add user guide for Binarizer.

(cherry picked from commit c8696337e2a5878f3171eb574c0a1365d45814c9)
Signed-off-by: Joseph K. Bradley <461476587780aa9fa5611ea6dc3912c146a91760@databricks.com>

andrewor14/iolap,andrewor14/iolap,andrewor14/iolap,andrewor14/iolap,andrewor14/iolap,andrewor14/iolap,andrewor14/iolap