add pandas_flavor

Author: eyaltrabelsi

README.md

@@ -196,6 +196,7 @@
 * [koalas](https://github.com/databricks/koalas) - pandas API on Apache Spark. <img height="20" src="img/pandas_big.png" alt="pandas compatible">
 * [modin](https://github.com/modin-project/modin) - Speed up your pandas workflows by changing a single line of code. <img height="20" src="img/pandas_big.png" alt="pandas compatible">
 * [swifter](https://github.com/jmcarpenter2/swifter) - A package which efficiently applies any function to a pandas dataframe or series in the fastest available manner.
+* [pandas_flavor](https://github.com/Zsailer/pandas_flavor) - A package which allow to write your own flavor of Pandas easily
 
 ### Pipelines
 * [pdpipe](https://github.com/shaypal5/pdpipe) - Sasy pipelines for pandas DataFrames.