Update account_objects test:

* Use Request over json-rpc
* Use lodash to filter irrelevant fields from expectations
* Use LedgerState for state setup
* Test using limit and marker

Conflicts:
	test/account_objects-test.js

package.json

@@ -10,6 +10,7 @@
     "async": "~0.2.9",
     "deep-equal": "0.0.0",
     "extend": "~1.2.0",
+    "lodash": "^3.5.0",
     "request": "^2.47.0",
     "ripple-lib": "0.10.0",
     "simple-jsonrpc": "~0.0.2"