Update readme and update api_key

.travis.yml

@@ -36,7 +36,7 @@ matrix:
 deploy:
   provider: releases
   api_key:
-    secure: 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
+    secure: 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
   file_glob: true
   file: target/release/*
   skip_cleanup: true

README.md

@@ -1,3 +1,41 @@
+# Bigtable Viewer
+
 [![Build Status](https://travis-ci.org/erikmafo/BigtableViewer.svg?branch=master)](https://travis-ci.org/erikmafo/BigtableViewer)
 
-# BigtableViewer
+Bigtable viewer is an application that lets you view and query the contents of Google Bigtable tables.
+
+## Installation
+
+Download and run the [installer](https://github.com/erikmafo/BigtableViewer/releases/tag/v0.1.5) 
+for your operating system
+
+Set the environment variable GOOGLE_APPLICATION_CREDENTIALS to the path of a file containing the 
+credentials for a service account with access to your Bigtable tables.
+
+## Usage
+
+When the application has started, click on the 'Add Bigtable instance' button
+
+![Add Bigtable instance](https://user-images.githubusercontent.com/11388438/85906811-bf328200-b80f-11ea-9bf3-13fd426f83ba.png)
+
+Enter the projectId and the instanceId of a Bigtable instance. The application 
+should display all tables of the instance:
+
+![Display tables](https://user-images.githubusercontent.com/11388438/85920814-4535e380-b877-11ea-9f95-81924eb57691.png)
+
+Select the table that you would like to view. The application should display the first few rows of the table
+
+![Display rows](https://user-images.githubusercontent.com/11388438/85920819-49fa9780-b877-11ea-9df8-d87f9fd3f50c.png)
+
+By clicking on the 'Configure value types' button you can configure how the application should interpret 
+the columns in your table
+
+![Configure value types](https://user-images.githubusercontent.com/11388438/85920859-abbb0180-b877-11ea-9d9e-2833feb1f8e1.png)
+
+Click OK and the application updates the view of the table
+
+![Display rows with value types](https://user-images.githubusercontent.com/11388438/85920860-ad84c500-b877-11ea-91c1-bb16ad1d51aa.png)
+
+## Licence
+
+See [licence file](LICENSE).