Added roadmap (#394)

CONTRIBUTING.md

@@ -2,6 +2,10 @@
 
 This page lists recommendations and requirements for how to best contribute to TransmogrifAI. We strive to obey these as best as possible. As always, thanks for contributing – we hope these guidelines make it easier and shed some light on our approach and processes.
 
+# Getting started
+
+Please join the community on Gitter [![Chat](https://badges.gitter.im/salesforce/TransmogrifAI.svg)](https://gitter.im/salesforce/TransmogrifAI?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge). Also please make sure to take a look at the project [roadmap](ROADMAP.md) to see where are headed.
+
 # Issues, requests & ideas
 
 Use GitHub [Issues](https://github.com/salesforce/TransmogrifAI/issues) page to submit issues, enhancement requests and discuss ideas.

ROADMAP.md

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+# The TransmogrifAI Roadmap
+
+## Short Term
+
+- Implement Python interface for loading and evaluating TransmogrifAI models - [#393](https://github.com/salesforce/TransmogrifAI/issues/393)
+- Extend Python interface to allow defining workflows & train models with existing TransmogrifAI readers, stages etc. - [#393](https://github.com/salesforce/TransmogrifAI/issues/393)
+- Standatize versioning of TransmogrifAI models format and implement verification for safe execution - [#397](https://github.com/salesforce/TransmogrifAI/issues/397)
+- Implement deep learning support, e.g. an ability to load an TensorFlow models and score them - [#288](https://github.com/salesforce/TransmogrifAI/issues/248), [#355](https://github.com/salesforce/TransmogrifAI/pull/355)
+- Investigate integration with [JohnSnowNLP](https://github.com/JohnSnowLabs/spark-nlp) library, since it has some many fancy operations that we could use
+
+
+
+## Long Term
+
+- Extend Python interface to allow defining custom readers & stages with Python code snippets - [#393](https://github.com/salesforce/TransmogrifAI/issues/393)
+- Allow exporting TransmogrifAI models in MLeap or other popular format, e.g. ONNX