Updated mediawiki/extensions
Project: mediawiki/extensions/GooglePlusOne  5164d53da4d6e592f119aa6ba990bc14dc8ff63a

* Bump version
* Clean up code
* Standardize on “googlePlusOne” — more verbose but clearer than “google1”
* Use tags instead of numbers for styles — matches the G+ site better
* Allow substitution of plusone.js
* Add review and ignore files

Change-Id: I4347be117032c18a5558dd89c4981ae9a4e4f182