update readme with usage and license

README.md

@@ -3,9 +3,31 @@
 Contains as a json the configuration that is used by various project
 to retrieve information from Hackafe's trello boards.
 
+## Usage
+
+### Node
+
+```
+npm install --save hackafe-trello-config
+```
+
+```
+var boardId = require('hackafe-trello-config').boardId
+```
+
+### Remote
+
+```
+GET http://trello-config.hackafe.org/config.json
+```
+
 ## Specification
 
 The package contains a single file [config.json](config.json) formatted as
 JSON, with embedded comments following the pattern: `"-//field": "comment"`.
 This is to provide maximum compatibility with all the strict json parsers out
 there.
+
+## License
+
+[ISC](LICENSE). Copyright (c) [Geno Rouspky](https://github.com/groupsky).