Implemented support to modify slot return type.

Included method type in DynamicQMetaObject metadata.
Moved Signal/Slot objet to libpyside.
Create unittest to signal class.
Implemented disconnection function.
Fixed emit method on signal object

tests/signals/signal_object_test.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+
+import sys
+import unittest
+import functools
+
+from PySide.QtCore import *
+
+class MyObject(QObject):
+    sig1 = Signal()
+    sig2 = Signal(int, name='rangeChanged')
+
+
+    @Slot(int)
+    def myRange(self, r):
+        print "Range changed:", r
+
+
+    def slot1(self):
+        self._called = True
+
+
+
+class SignalObjectTest(unittest.TestCase):
+
+    def testsingleConnect(self):
+        o = MyObject()
+        o.sig1.connect(o.slot1)
+        o.sig1.emit()
+        self.assert_(o._called)
+
+    def testSignatureParse(self):
+        o = MyObject()
+        o.sig2.connect(o.myRange)
+        o.sig2.emit(10)
+
+
+if __name__ == '__main__':
+    unittest.main()