Bump version to 1.6.1

1.6.0 was never put into the package definition. This is just a fix of
that which requires a minor bump as well.

rg.el

@@ -6,7 +6,7 @@
 ;;
 ;; Author: David Landell <david.landell@sunnyhill.email>
 ;;         Roland McGrath <roland@gnu.org>
-;; Version: 1.5.0
+;; Version: 1.6.1
 ;; URL: https://github.com/dajva/rg.el
 ;; Package-Requires: ((cl-lib "0.5") (emacs "24.3") (s "1.10.0"))
 ;; Keywords: matching, tools