Update ru.coffee

I am extremely dissatisfied the support of CodeCombat internationalization by programmers. Make changes to the requirements of the new code; it must be completely covered by the i18n tags reflected in en.coffee.
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'
Merge pull request #930 from M-r-A/patch-1

Update ru.coffee
Merge branch 'master' into feature/thangload