Squashed spy refactor and new spy syntax

Jasmine spies now have a 'and' property which allows the user to
change the spy's execution strategy-- such as '.and.callReturn(4)'
and a 'calls' property which allows inspection of the calls a spy
has received.

* This is a breaking change *

There is a CallTracker that keeps track of all calls and arguments
and a SpyStrategy which determines what the spy should do when it
is called.

src/core/CallTracker.js

@@ -0,0 +1,50 @@
+getJasmineRequireObj().CallTracker = function() {
+
+  function CallTracker() {
+    var calls = [];
+
+    this.track = function(context) {
+      calls.push(context);
+    };
+
+    this.any = function() {
+      return !!calls.length;
+    };
+
+    this.count = function() {
+      return calls.length;
+    };
+
+    this.argsFor = function(index) {
+      var call = calls[index];
+      return call ? call.args : [];
+    };
+
+    this.all = function() {
+      return calls;
+    };
+
+    this.allArgs = function() {
+      var callArgs = [];
+      for(var i = 0; i < calls.length; i++){
+        callArgs.push(calls[i].args);
+      }
+
+      return callArgs;
+    };
+
+    this.first = function() {
+      return calls[0];
+    };
+
+    this.mostRecent = function() {
+      return calls[calls.length - 1];
+    };
+
+    this.reset = function() {
+      calls = [];
+    };
+  }
+
+  return CallTracker;
+};