Feature/client validation#19

Created by: wasabideveloper

Implementation of feature #19 (closed) (Merge will close #19 (closed) ).

• locales NOT compiled -> do this on release (prevent huge locale diffs in changes)
• JS string NOT localized. Todo later: #293 .
• ran tests
• tested views by hand:
  • /orders/new [get/post]

To be reviewed by:

• @das-g
• @hixi

*Contains changes of #254 (closed) *

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