README.md in opal-erb-0.0.1 vs README.md in opal-erb-0.0.2

@@ -1,13 +1,26 @@
 # opal-erb: ERB for Opal
+
+## Usage
+
+opal-erb will automatically compile erb files using the `.opalerb` extension.
+
+## Running specs
+
+You must have phantomjs installed.
+
+```text
+$ bundle
+$ bundle exec rake
+```