Added matchers: truthy, falsy, empty and notEmpty

src/core/asymmetric_equality/Truthy.js

@@ -0,0 +1,18 @@
+getJasmineRequireObj().Truthy = function(j$) {
+
+    function Truthy() {}
+
+    Truthy.prototype.asymmetricMatch = function(other) {
+        if (other) {
+            return true;
+        }
+
+        return false;
+    };
+
+    Truthy.prototype.jasmineToString = function() {
+        return '<jasmine.truthy>';
+    };
+
+    return Truthy;
+};