Added automatic .go.erb compilation

fixes #16

README.md

@@ -3,6 +3,29 @@ pgx
 
 Experimental PostgreSQL client library for Go
 
+Usage
+=====
+
+TODO
+
+Development
+===========
+
+ERB Templating
+--------------
+
+Sometimes Go code can be repetitive especially with dealing with functions that only differ in the type (e.g. ReadInt16, ReadInt32, ReadInt64). Some of this repetition can be eliminated by using a template preprocessor. pgx uses Ruby erb templates. Files that end in .go.erb are used to produce the corresponding .go files. These files can be automatically processed with guard -- a Ruby file and directory watcher.
+
+Prerequisites:
+
+* Ruby
+* guard
+* guard-tilt
+
+To automatically process .go.erb files open a shell in the pgx directory and run:
+
+    jack@hk-47~/dev/pgx$ guard
+
 Testing
 -------