Merge pull request #370 from Smashman/dev

App page badge changes
localize "cards owned" on app page

Also, adds "Not unlocked" to incomplete foil badges
make foil badge links point to foil badge pages
add custom amount to wallet

First commit for this feature, will clean this up a bit later
localize wallet text, fix currency symbol code
Uses #364 to add market links and card prices

Currently only in USD, but should work for now
Adds badge completion cost to badge progress page

This can be converted to local currency when the API is set up to handle
this.
badge prices return in store currency type
Add "2-Pack" to pack split detection, due to Orcs Must Die 2. http://store.steampowered.com/app/201790/