README.md in itunes_csv-0.0.1 vs README.md in itunes_csv-0.0.2

@@ -1,22 +1,52 @@
 # iTunes CSV
 
 Export iTunes Library XML data to CSV
 
+# Why?
+
+iTunes allows you to copy and paste from iTunes into a spreadsheet, but this only includes visible columns. For non-visible columns you need to extract from the XML.
+
 ## Installation
 
     $ gem install itunes_csv
 
 ## Usage
 
     $ itunes_csv --help
     Usage: itunes_csv [options]
-        -f, --fields name,track,year     List of fields(default: name,artist)
+        -f, --fields name,track,year     List of fields (default: name,artist)
         -p, --path PATH                  Path to iTunes XML file (default: ~/Music/iTunes/iTunes Music Library.xml)
 
 ## Notes
 
 May take a long time to run for a large iTunes library (10,000+ tracks)
+
+Supported fields:
+
+ * album
+ * artist
+ * audio?
+ * audiobook?
+ * composer
+ * date_added
+ * episode_number
+ * genre
+ * id
+ * kind
+ * last_played_at
+ * movie?
+ * number
+ * persistent_id
+ * play_count
+ * played?
+ * podcast?
+ * season_number
+ * total_time
+ * tv_show?
+ * unplayed?
+ * video?
+ * year
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)