moving to koa 2.0; + api

package.json

@@ -22,15 +22,17 @@
     "babel-preset-stage-0": "^6.5.0",
     "co": "^4.4.0",
     "instagram-node": "^0.5.1",
-    "koa-bodyparser": "^2.0.1",
+    "koa": "^2.0.0-alpha.3",
+    "koa-bodyparser": "^3.0.0",
+    "koa-compose": "^3.1.0",
     "koa-conditional-get": "^1.0.2",
+    "koa-convert": "^1.2.0",
     "koa-etag": "^2.0.0",
     "koa-helmet": "^1.0.0",
     "koa-logger": "^1.2.2",
     "koa-prerender": "^1.0.3",
-    "koa-route": "^2.4.0",
+    "koa-route": "^3.1.0",
     "koa-static": "^2.0.0",
-    "koa": "^1.2.0",
     "mz": "^2.3.1",
     "promised-mongo": "git+https://git@github.com/tmshv/promised-mongo",
     "sitemap": "^1.5.0",