Update README.rst

Author: tholor

README.rst

@@ -66,6 +66,10 @@ Components
 Resources
 =========
 
+**Documentation:** https://haystack.deepset.ai
+
+**Tutorials**
+
 - Tutorial 1  - Basic QA Pipeline: `Jupyter notebook  <https://github.com/deepset-ai/haystack/blob/master/tutorials/Tutorial1_Basic_QA_Pipeline.ipynb>`__  or `Colab <https://colab.research.google.com/github/deepset-ai/haystack/blob/master/tutorials/Tutorial1_Basic_QA_Pipeline.ipynb>`_
 - Tutorial 2  - Fine-tuning a model on own data: `Jupyter notebook <https://github.com/deepset-ai/haystack/blob/master/tutorials/Tutorial2_Finetune_a_model_on_your_data.ipynb>`__ or `Colab <https://colab.research.google.com/github/deepset-ai/haystack/blob/master/tutorials/Tutorial2_Finetune_a_model_on_your_data.ipynb>`__
 - Tutorial 3  - Basic QA Pipeline without Elasticsearch: `Jupyter notebook <https://github.com/deepset-ai/haystack/blob/master/tutorials/Tutorial3_Basic_QA_Pipeline_without_Elasticsearch.ipynb>`__ or `Colab <https://colab.research.google.com/github/deepset-ai/haystack/blob/master/tutorials/Tutorial3_Basic_QA_Pipeline_without_Elasticsearch.ipynb>`__