Change readme date

Nothing interesting - just changing date to correct year!
Add more support text for contributions

Just a bit more text to explain how to contribute to Wonderflux (all patches welcome!)
Theme compatibility check - theme must display tags

This is a requirement for theme compatibility - theme must display tags in appropriate places!
Add in text domain for translation

More missed text domains
Merge pull request #32 from Jonnyauk/master

Merge Wondergrid work into master branch