Update JS unit test libs

Update sinon to 1.15.4.
Update karma-jasmine to 0.3.0
Update jasmine to 2.3.4

This brings a bunch of new useful functions for unit testing.

build/package.json

@@ -12,11 +12,12 @@
   "dependencies": {},
   "devDependencies": {
     "karma": "~0.12.0",
-                "karma-jasmine": "~0.2.0",
+    "karma-jasmine": "~0.3.0",
     "karma-junit-reporter": "*",
     "karma-coverage": "*",
     "karma-phantomjs-launcher": "*",
-                "phantomjs": "*"
+    "phantomjs": "*",
+    "jasmine-core": "~2.3.4"
   },
   "engine": "node >= 0.8"
 }

tests/karma.config.js

@@ -121,7 +121,7 @@ module.exports = function(config) {
 	}
 
 	// extra test libs
-	files.push(corePath + 'tests/lib/sinon-1.7.3.js');
+	files.push(corePath + 'tests/lib/sinon-1.15.4.js');
 
 	// core mocks
 	files.push(corePath + 'tests/specHelper.js');