Allow to specify code in errors
Add and remove pins (without ownership verification)
Send only pins HTML (for an AJAX call)
Do not send created pin
Retrieve a pin
Move salesFetch-related functions to their own file
Moar error pages
Security check
Refactor parameter checking to a middleware
Smarter error rendering
Use async.waterfall
Check that `id` looks like an ObjectId
Use async.waterfall
Style
Send proper errors
Errors were not proper (fixed, need to use better error handling)
Merge branch 'add-pin' into template