Add support for torque tiles and attributes fetching

Retargets self to 1.7.0
Upgrades Windshaft to 0.16.0

Closes #118 -- CDB-1525 #resolve
Closes #112 -- CDB-1329 #resolve

package.json

@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "windshaft-cartodb",
-    "version": "1.6.4",
+    "version": "1.7.0",
     "description": "A map tile server for CartoDB",
     "keywords": [
       "cartodb"
@@ -24,7 +24,7 @@
     "dependencies": {
         "node-varnish": "0.1.1",
         "underscore"  : "~1.3.3",
-        "windshaft"  : "~0.15.1",
+        "windshaft"  : "~0.16.0",
         "step": "0.0.x",
         "request": "2.9.202",
         "cartodb-redis": "~0.3.0",