added pyspark examples with RDDs and DataFrames

Author: mahmoudparsian

Diff for: tutorial/pyspark-examples/dataframes/VIDEO-DataFrames.txt

@@ -0,0 +1,8 @@
+Structuring Apache Spark 2.0: SQL, DataFrames, Datasets And Streaming - by Michael Armbrust
+https://www.youtube.com/watch?v=1a4pgYzeFwE
+28 mins
+
+AWS Tutorial - AWS Athena + S3
+20 mins
+https://www.youtube.com/watch?v=SiUDN95sJIo
+

Diff for: tutorial/pyspark-examples/dataframes/dataframe-examples.md

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+## Spark DataFrame Examples (using PySpark):
+
+1. [Introduction to PySpark DataFrames (slides)](https://projector-video-pdf-converter.datacamp.com/13023/chapter3.pdf)
+
+2. [Apache Spark's DataFrame Examples](http://spark.apache.org/examples.html)
+
+3. [PySpark Dataframe Basics](https://changhsinlee.com/pyspark-dataframe-basics/)
+
+4. [PySpark Dataframe Basics -- notebook](https://github.com/changhsinlee/changhsinlee.github.io/blob/master/notebook/2018-03-04-pyspark-dataframe-basics/dataframe-basics.ipynb)
+
+5. [My Tutorial/Spark SQL Tutorial (PySpark)](https://www.zepl.com/viewer/notebooks/bm90ZTovL3pqZmZkdS8wN2M3YmI0MmJjMWI0YmE0OTc1M2IzMzZkMjA2MTk4Ny9ub3RlLmpzb24)
+
+6. [Complete Guide on DataFrame Operations in PySpark](https://www.analyticsvidhya.com/blog/2016/10/spark-dataframe-and-operations/)
+
+7. [Introduction to DataFrame Operations in PySpark](https://docs.databricks.com/spark/latest/dataframes-datasets/introduction-to-dataframes-python.html)
+
+8. [PySpark DataFrame Tutorial: Introduction to DataFrames](https://dzone.com/articles/pyspark-dataframe-tutorial-introduction-to-datafra)
+
+9. [Introduction to DataFrames - Python](https://docs.databricks.com/spark/latest/dataframes-datasets/introduction-to-dataframes-python.html)
+
+10. [How to use Spark SQL: A hands-on tutorial](https://opensource.com/article/19/3/apache-spark-and-dataframes-tutorial)