make the exercices solutions files executables.

doc/tutorial/adding_solution_1.py

-
+#!/usr/bin/env python
 # Theano tutorial
 # Solution to Exercise in section 'Baby Steps - Algebra'
 
@@ -8,4 +8,3 @@ b = theano.tensor.vector()  # declare variable
 out = a ** 2 + b ** 2 + 2 * a * b  # build symbolic expression
 f = theano.function([a, b], out)   # compile function
 print f([1, 2], [4, 5])  # prints [ 25.  49.]
-

doc/tutorial/extending_theano_solution_1.py

-
+#!/usr/bin/env python
 # Theano tutorial
 # Solution to Exercise in section 'Extending Theano'
-
+import unittest
 
 import theano
 
@@ -164,11 +164,4 @@ class TestSumDiffOp(utt.InferShapeTester):
                                 self.op_class)
 
 if __name__ == "__main__":
-
-    t = TestOp('setUp')
-    t.setUp()
-    t.test_perform()
-    # comment out next instruction in case 2 since autotesting of
-    # gradient of multiple output functions is not implemented yet
-    t.test_gradient()  # enable in case 1, disable in case 2
-    t.test_infer_shape()
+    unittest.main()

doc/tutorial/loop_solution_1.py

-
+#!/usr/bin/env python
 # Theano tutorial
 # Solution to Exercise in section 'Loop'
 

doc/tutorial/modes_solution_1.py

-
+#!/usr/bin/env python
 # Theano tutorial
 # Solution to Exercise in section 'Configuration Settings and Compiling Modes'
 

doc/tutorial/using_gpu_solution_1.py

-
+#!/usr/bin/env python
 # Theano tutorial
 # Solution to Exercise in section 'Using the GPU'