bump minor version number to acknowledge @Angelsanz enhancements to d…

…oc/README/package.json

package.json

@@ -1,6 +1,6 @@
 {
   "name": "regularity",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "regular expressions for humans",
   "main": "lib/regularity.js",
   "author": "Fernando Martinez de la Cueva <me@oinak.com> (http://oinak.com/)",