fixed imports

src/rbm/stack_deep.py

@@ -1,7 +1,7 @@
-from status import Status
-from train import train
-from stack import Stack, StackType
-from matrix import Mat, np
+from .status import Status
+from .train import train
+from .stack import Stack, StackType
+from .matrix import Mat, np
 
 class StackDeep(Stack):
 	def __init__(self, name: str, work_dir: str = '.'):