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.

spec/core/CallTrackerSpec.js

@@ -0,0 +1,105 @@
+describe("CallTracker", function() {
+  it("tracks that it was called when executed", function() {
+    var callTracker = new j$.CallTracker();
+
+    expect(callTracker.any()).toBe(false);
+
+    callTracker.track();
+
+    expect(callTracker.any()).toBe(true);
+  });
+
+  it("tracks that number of times that it is executed", function() {
+    var callTracker = new j$.CallTracker();
+
+    expect(callTracker.count()).toEqual(0);
+
+    callTracker.track();
+
+    expect(callTracker.count()).toEqual(1);
+  });
+
+  it("tracks the params from each execution", function() {
+    var callTracker = new j$.CallTracker();
+
+    callTracker.track({object: void 0, args: []});
+    callTracker.track({object: {}, args: [0, "foo"]});
+
+    expect(callTracker.argsFor(0)).toEqual([]);
+
+    expect(callTracker.argsFor(1)).toEqual([0, "foo"]);
+  });
+
+  it("returns any empty array when there was no call", function() {
+    var callTracker = new j$.CallTracker();
+
+    expect(callTracker.argsFor(0)).toEqual([]);
+  });
+
+  it("allows access for the arguments for all calls", function() {
+    var callTracker = new j$.CallTracker();
+
+    callTracker.track({object: {}, args: []});
+    callTracker.track({object: {}, args: [0, "foo"]});
+
+    expect(callTracker.allArgs()).toEqual([[], [0, "foo"]]);
+  });
+
+  it("tracks the context and arguments for each call", function() {
+    var callTracker = new j$.CallTracker();
+
+    callTracker.track({object: {}, args: []});
+    callTracker.track({object: {}, args: [0, "foo"]});
+
+    expect(callTracker.all()[0]).toEqual({object: {}, args: []});
+
+    expect(callTracker.all()[1]).toEqual({object: {}, args: [0, "foo"]});
+  });
+
+  it("simplifies access to the arguments for the last (most recent) call", function() {
+    var callTracker = new j$.CallTracker();
+
+    callTracker.track();
+    callTracker.track({object: {}, args: [0, "foo"]});
+
+    expect(callTracker.mostRecent()).toEqual({
+      object: {},
+      args: [0, "foo"]
+    });
+  });
+
+  it("returns a useful falsy value when there isn't a last (most recent) call", function() {
+    var callTracker = new j$.CallTracker();
+
+    expect(callTracker.mostRecent()).toBeFalsy();
+  });
+
+  it("simplifies access to the arguments for the first (oldest) call", function() {
+    var callTracker = new j$.CallTracker();
+
+    callTracker.track({object: {}, args: [0, "foo"]});
+
+    expect(callTracker.first()).toEqual({object: {}, args: [0, "foo"]})
+  });
+
+  it("returns a useful falsy value when there isn't a first (oldest) call", function() {
+    var callTracker = new j$.CallTracker();
+
+    expect(callTracker.first()).toBeFalsy();
+  });
+
+
+  it("allows the tracking to be reset", function() {
+    var callTracker = new j$.CallTracker();
+
+    callTracker.track();
+    callTracker.track({object: {}, args: [0, "foo"]});
+    callTracker.reset();
+
+    expect(callTracker.any()).toBe(false);
+    expect(callTracker.count()).toEqual(0);
+    expect(callTracker.argsFor(0)).toEqual([]);
+    expect(callTracker.all()).toEqual([]);
+    expect(callTracker.mostRecent()).toBeFalsy();
+  });
+});