browserify: implement error checks, path checks, and support express

lib/embed.js

@@ -1,5 +1,6 @@
 /**
  * Copyright (c) 2013 Craig Condon
+ * Copyright (c) 2015-2016 Jared Allard
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -21,7 +22,7 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  **/
- 
+
 var path = require("path"),
     fs = require("fs");