global refactoring and fixes,

removed support of extracted(aligned) PNG faces. Use old builds to convert from PNG to JPG.

fanseg model file in facelib/ is renamed

core/leras/models/CodeDiscriminator.py

@@ -0,0 +1,22 @@
+from core.leras import nn
+tf = nn.tf
+
+class CodeDiscriminator(nn.ModelBase):
+    def on_build(self, in_ch, code_res, ch=256, conv_kernel_initializer=None):            
+        n_downscales = 1 + code_res // 8
+
+        self.convs = []
+        prev_ch = in_ch
+        for i in range(n_downscales):
+            cur_ch = ch * min( (2**i), 8 )
+            self.convs.append ( nn.Conv2D( prev_ch, cur_ch, kernel_size=4 if i == 0 else 3, strides=2, padding='SAME', kernel_initializer=conv_kernel_initializer) )
+            prev_ch = cur_ch
+
+        self.out_conv =  nn.Conv2D( prev_ch, 1, kernel_size=1, padding='VALID', kernel_initializer=conv_kernel_initializer)
+
+    def forward(self, x):
+        for conv in self.convs:
+            x = tf.nn.leaky_relu( conv(x), 0.1 )
+        return self.out_conv(x)
+        
+nn.CodeDiscriminator = CodeDiscriminator