have Makefile `cp -r` the _static contents

with the inclusion of jquery and boostrap, Makefile exits on build
because _static now contains directories.

cronjob.py

@@ -12,8 +12,6 @@ import subprocess
 
 stripe.api_key = _cfg("stripe-secret")
 
-currency = _cfg("currency")
-
 print("Processing monthly donations at " + str(datetime.utcnow()))
 
 donations = Donation.query \
@@ -31,7 +29,7 @@ for donation in donations:
         try:
             charge = stripe.Charge.create(
                 amount=donation.amount,
-                currency=currency,
+                currency="usd",
                 customer=user.stripe_customer,
                 description="Donation to " + _cfg("your-name")
             )

fosspay/currency.py

@@ -13,8 +13,7 @@ class Currency:
 
 currencies = {
     'usd' : Currency("$", "left"),
-    'eur' : Currency("€", "right"),
-    'cad' : Currency("$", "left")
+    'eur' : Currency("€", "right")
     # ... More currencies can be added here
 }