add README info

Author: grawk

README.md

@@ -1 +1,24 @@
 # nemo-logger
+
+Nemo plugin which instantiates the [selenium-webdriver console logger](http://seleniumhq.github.io/selenium/docs/api/javascript/module/selenium-webdriver/lib/logging.html).
+
+## Requirements
+
+`nemo@2` and above, to get the versions of `selenium-webdriver` with logging support.
+
+## Usage
+
+1. `npm install --save-dev nemo-logger`
+2. add to your nemo plugins config:
+
+```
+"logger": {
+      "module": "nemo-logger",
+      "arguments": ["ALL"] // optional
+    }
+```
+
+If you include the single argument, make sure it matches one of the levels here:
+http://seleniumhq.github.io/selenium/docs/api/javascript/module/selenium-webdriver/lib/logging_exports_Level.html
+
+If you don't include the argument, `ALL` is the default.