Merge pull request #21 from Zauberfisch/2.1

fixed visibility of statics for SilverStripe 3.1
BUGFIX: Product options not exactly matching available variations, refs #23.
BUGFIX: Order updates creating another Order, fixes #25.
BUGFIX: Public access to hidden_sections static.
MINOR: Adding i18n to product form.
MINOR: Updated i18n for cart form.
MINOR: Updated i18n for checkout page.
MINOR: Change to export button positioning in admin area.
NEW: Adding Transifex support.
MINOR: Updating translation files.
BUGFIX: Only orders which have been completed displayed in admin.
NEW: Dutch translation thanks to Simon Erkelens @Firesphere!
Finnish translation

Translation for Finnish users
Merge pull request #27 from mediaclinic/2.1

Finnish translation