Rewrote resolver for accuracy and efficiency

The resolver was rewritten to fix numerous bugs and performance issues.
The reason for this is over the years, bug fixes and features have been
added on top of json-refs and its resolver logic has become crufty.  The
new rewrite is clean, does not reinvent the wheel and fixes many bugs.

Fixes: #80, #87, #88, #89, #97, #100, #101, #103

.travis.yml

@@ -1,9 +1,8 @@
 language: node_js
 sudo: false
 node_js:
-  - "0.10"
-  - "0.12"
   - "node"
+  - "4"
 branches:
   only:
     - master

RELEASE_NOTES.md

@@ -1,8 +1,12 @@
 ## Release Notes
 
+### v2.2.0 TBD
+
+* Resolver rewrite *(Issues #80, #87, #88, #89, #97, #100, #101 and #103)*
+
 ### v2.1.6 (2016-06-14)
 
-* Fixed a bug where identifying circular references failed for local, indirect references *(Issue #82)_
+* Fixed a bug where identifying circular references failed for local, indirect references *(Issue #82)*
 
 ### v2.1.5 (2016-02-02)
 

bower.json

@@ -22,7 +22,8 @@
     "test"
   ],
   "dependencies": {
-    "path-loader": "~1.0.1"
+    "path-loader": "~1.0.1",
+    "graphlib": "^2.1.1"
   },
   "devDependencies": {
     "mocha": "~2.3.4"