Merge pull request #1442 from chaoss/readme-patch-2

update readme to refer to new primary branch as `main`

README.md

@@ -5,7 +5,7 @@
 
 branch | status
    --- | ---
-master | [![Build Status](https://travis-ci.com/chaoss/augur.svg?branch=master)](https://travis-ci.com/chaoss/augur)
+  main | [![Build Status](https://travis-ci.com/chaoss/augur.svg?branch=main)](https://travis-ci.com/chaoss/augur)
    dev | [![Build Status](https://travis-ci.com/chaoss/augur.svg?branch=dev)](https://travis-ci.com/chaoss/augur)
 
 
@@ -40,7 +40,7 @@ This data is collected by dedicated data collection workers controlled by Augur,
 
 ## Getting Started
 
-If you're interested in collecting data with our tool, the Augur team has worked hard to develop a detailed guide to get started with our project which can be found [in our documentation](https://oss-augur.readthedocs.io/en/master/getting-started/toc.html).
+If you're interested in collecting data with our tool, the Augur team has worked hard to develop a detailed guide to get started with our project which can be found [in our documentation](https://oss-augur.readthedocs.io/en/main/getting-started/toc.html).
 
 If you're looking to contribute to Augur's code, you can find installation instructions, development guides, architecture references (coming soon), best practices and more in our [developer documentation](https://oss-augur.readthedocs.io/en/main/development-guide/toc.html). Please know that while it's still rather sparse right now,
 but we are actively adding to it all the time. If you get stuck, please feel free to [ask for help](https://github.com/chaoss/augur/issues/new)!