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/Spy.js

@@ -1,86 +0,0 @@
-getJasmineRequireObj().Spy = function(j$) {
-
-  function Spy(name) {
-    this.identity = name || 'unknown';
-    this.isSpy = true;
-    this.plan = function() {
-    };
-    this.mostRecentCall = {};
-
-    this.argsForCall = [];
-    this.calls = [];
-  }
-
-  Spy.prototype.andCallThrough = function() {
-    this.plan = this.originalValue;
-    return this;
-  };
-
-  Spy.prototype.andReturn = function(value) {
-    this.plan = function() {
-      return value;
-    };
-    return this;
-  };
-
-  Spy.prototype.andThrow = function(exceptionMsg) {
-    this.plan = function() {
-      throw exceptionMsg;
-    };
-    return this;
-  };
-
-  Spy.prototype.andCallFake = function(fakeFunc) {
-    this.plan = fakeFunc;
-    return this;
-  };
-
-  Spy.prototype.reset = function() {
-    this.wasCalled = false;
-    this.callCount = 0;
-    this.argsForCall = [];
-    this.calls = [];
-    this.mostRecentCall = {};
-  };
-
-  j$.createSpy = function(name) {
-
-    var spyObj = function() {
-      spyObj.wasCalled = true;
-      spyObj.callCount++;
-      var args = j$.util.argsToArray(arguments);
-      spyObj.mostRecentCall.object = this;
-      spyObj.mostRecentCall.args = args;
-      spyObj.argsForCall.push(args);
-      spyObj.calls.push({object: this, args: args});
-      return spyObj.plan.apply(this, arguments);
-    };
-
-    var spy = new Spy(name);
-
-    for (var prop in spy) {
-      spyObj[prop] = spy[prop];
-    }
-
-    spyObj.reset();
-
-    return spyObj;
-  };
-
-  j$.isSpy = function(putativeSpy) {
-    return putativeSpy && putativeSpy.isSpy;
-  };
-
-  j$.createSpyObj = function(baseName, methodNames) {
-    if (!j$.isArray_(methodNames) || methodNames.length === 0) {
-      throw "createSpyObj requires a non-empty array of method names to create spies for";
-    }
-    var obj = {};
-    for (var i = 0; i < methodNames.length; i++) {
-      obj[methodNames[i]] = j$.createSpy(baseName + '.' + methodNames[i]);
-    }
-    return obj;
-  };
-
-  return Spy;
-};