manual extractor: increased FPS,

sort by final : now you can specify target number of images,
converter: fix seamless mask and exception,
huge refactoring

models/__init__.py

@@ -1,7 +1,4 @@
 from .ModelBase import ModelBase
-from .ConverterBase import ConverterBase
-from .ConverterMasked import ConverterMasked
-from .ConverterImage import ConverterImage
 
 def import_model(name):
     module = __import__('Model_'+name, globals(), locals(), [], 1)