Update the readme

Author: tclem

README.md

@@ -1,11 +1,39 @@
 # Vim Arduino
 
-This script allows you to compile and deploy Arduino (*.pde) files
-directly from vim.
+This script allows you to compile and deploy Arduino (*.pde) sketches
+directly from Vim.
 
-# Requirements
+## Install
 
-You must have the [Arduino][arduino] IDE installed.
+The plugin should be organized in a manner that works well with
+pathogen. I personally use [janus][janus] to manage my MacVim setup so
+adding this line to my `~/.janus.rake` file does the trick:
 
-[arduino]: http://arduino.cc/en/Main/Software
+```
+vim_plugin_task "vim-arduino", "https://github.com/tclem/vim-arduino.git"
+```
+
+## Usage
+
+You must have a pde (Arduino sketch) open in the current buffer.
+
+`<Leader>ac` - Compile the current sketch.
+
+`<Leader>ad` - Compile and deploy the current sketch.
+
+`<Leader>as` - Open a serial port in `screen`.
 
+
+The default key mapping can be turned off by doing this in your `.vimrc`:
+
+```
+let g:vim_arduino_map_keys = 0
+```
+
+## Requirements
+
+You must have the [Arduino][arduino] IDE installed. Currently only
+Version 0022 is supported.
+
+[arduino]: http://arduino.cc/en/Main/Software
+[janus]: https://github.com/carlhuda/janus