Create new language--the wuu-chinese

Just for Wuu Chinese, including Shanghainese and such language in Zhejiang Province, China.
Integrating Wu as zh-WUU-HANS and zh-WUU-HANT; hacking on a fork of i18next to do so.
Added zh-WUU-HANS stubs.
Keeping Wu English stub.
Merge branch 'benojan-patch-2'