Add default arguments to constructor

Add to the simple test a constructor with a default argument.  This will
demonstrate that the constructor arguments are passed correctly.

Fixes #145

Tests/simple/simple.cxx

@@ -4,6 +4,10 @@
 simple::simple()
 {
 }
+simple::simple(int var1, int optional)
+{
+  std::cout << optional << "\n";
+}
 
 int simple::hello()
 {

Tests/simple/simple.h

@@ -4,6 +4,7 @@ class simple
 {
 public:
   simple();
+  simple(int var1, int optional=10);
   int hello();
 };
 

Tests/simple/simple.py

@@ -2,6 +2,11 @@ import simpleTest
 s = simpleTest.simple()
 r = s.hello()
 print("hello returned " + str(r) + "\n")
+
+q = simpleTest.simple(var1=1, optional=2);
+q1 = simpleTest.simple(1)
+
+
 if r == 10:
     exit(0)
 else: