Create specializations.md

For future specializations.

Author: johnaoss

extras/specializations.md

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+# Data Science - Specializations
+
+## Specializations
+
+* [Udacity](#udacity)
+ * [Machine Learning Nanodegree by Google](#machine-learning-nanodegree-by-google) 
+ * [Data Scientist Nanodegree](#data-scientist-nanodegree)
+* [edX](#edx)
+ * [Data Science and Engineering with Apache Spark](#data-science-and-engineering-with-apache-spark)
+* [Coursera](#coursera)
+ * [Data Mining Specialization](#data-mining-specialization)
+ * [Machine Learning Specialization](#machine-learning-specialization)
+ * [Data Science Specialization](#data-science-specialization)
+* [FutureLearn](#futurelearn)
+
+---
+
+### Udacity
+
+#### Machine Learning Nanodegree by Google
+Course | Duration | Effort
+:-- | :--: | :--: 
+
+#### Data Scientist Nanodegree
+Course | Duration | Effort
+:-- | :--: | :--: 
+
+### edX
+
+#### Data Science and Engineering with Apache Spark
+Course | Duration | Effort
+:-- | :--: | :--: 
+
+### Coursera
+
+#### Data Mining Specialization
+Course | Duration | Effort
+:-- | :--: | :--: 
+
+#### Machine Learning Specialization
+Course | Duration | Effort
+:-- | :--: | :--: 
+
+#### Data Science Specialization
+Course | Duration | Effort
+:-- | :--: | :--: 
+
+### FutureLearn