[QuickStatements] Units support

[Sébastien Santoro]

Wikidata now offers units support for values.

Would it be possible to add support to enter values with units in QuickStatements?

[James Hare]

Pull request here: https://bitbucket.org/magnusmanske/wikidata-todo/pull-requests/4/support-for-quantities-with-decimals-and/diff

Note that my pull request assumes the existence of a parameter within WiDaR, the existence of which I cannot verify independently.