Add a script to watch for changes and rebuild

Makefile

@@ -47,4 +47,7 @@ serve:
 	@echo
 	cd www && python -m SimpleHTTPServer
 
-.PHONY: debug ocean beta release publish publish_beta clean clean_blog clean_swift serve
+watch:
+	bin/watch
+
+.PHONY: debug ocean beta release publish publish_beta clean clean_blog clean_swift serve watch

bin/watch

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+BLOG_TARGET=${BLOG_TARGET:-ocean}
+
+while true; do
+  inotifywait -e modify,create,delete,move -r drafts -r posts
+  echo "changed at $(date)"
+  sleep 5
+  make "$TARGET"
+done