Initial zh_TW translation
Merge branch 'master' into zh-tw-trans
Update zh_TW translation

Previously used translation for "variation" (種類) conflicts with usages of
"type" (as in "card type") and "category" (both 分類 and 種類 were used).
Switch to use "規格" for "variation" (as used by pchome.com.tw), and unify
"category" translation to use "分類".
All strings are now translated
Added Tzu-ping Chung to AUTHORS.
Merge
Pull currency for Stripe from the settings file

With Stripe launching in different countries, the currency should be located in the configuration rather than hard coded in the processor
Adding Card Verification Field
Added Ryan Lander to AUTHORS.
Merge
Make STRIPE_CURRENCY setting backwards compatible.
Added www.zigzagbags.com.au to sites in README.
Add setting SHOP_ORDER_EMAIL_BCC

This should be set to an internal email address. All order receipt emails will be sent to this address via BCC, as well as being sent to the customer.
Ensure live stock lookup only uses unexpired carts.
Merge
New pt-BR translation
Added Breno Uchoa to AUTHORS
Merge
Revert cart to old values if update is not valid
Show invalid quantity in stock error in cart update, in prep for pr that resets cart form values.