wow-usd convert API route

wowfunding/api.py

@@ -22,4 +22,14 @@ def api_proposals_get(status, cat, limit, offset):
         print(ex)
         return 'error', 500
 
-    return [p.json for p in proposals]
+    return [p.json for p in proposals]
+
+
+@app.route('/api/1/convert/wow-usd')
+@endpoint.api(
+    parameter('wow', type=int, location='args', required=True)
+)
+def api_wow_usd(wow):
+    from wowfunding.bin.utils import Summary, wow_to_usd
+    prices = Summary.fetch_prices()
+    return jsonify(usd=wow_to_usd(wows=wow, btc_per_wow=prices['wow-btc'], usd_per_btc=prices['btc-usd']))