Gan

Ok, so I think that the modifications I made here can be merged ...

Two main changes as compared to the master:

1. Added some layers
2. Modified the way variable name and scope is handled in layers (and in SequenceNetwork as well)

Change 1 should by no means affect what has been done until now (on the master). However, change 2 may require a bit of adaptation, especially when defining architectures and layers ...

@tiago.pereira I'll let you check and then we can discuss

Also, I think that this will be irrelevant when we'll go to tf-slim anyway !

bob/learn/tensorflow/utils/util.py

@@ -20,7 +20,8 @@ def compute_euclidean_distance(x, y):
 def load_mnist(data_dir="./src/bob.db.mnist/bob/db/mnist/", perc_train=0.9):
 
     import bob.db.mnist
-    db = bob.db.mnist.Database(data_dir)
+    #db = bob.db.mnist.Database(data_dir)
+    db = bob.db.mnist.Database()
     raw_data = db.data()
 
     # data  = raw_data[0].astype(numpy.float64)