Add changes from sprint 1 and 2 to master

Add changes from Sprint 1 and 2 to master.

b_asic/__init__.py

+"""
+Better ASIC Toolbox.
+TODO: More info.
+"""
+from b_asic.core_operations import *
+from b_asic.graph_component import *
+from b_asic.graph_id import *
+from b_asic.operation import *
+from b_asic.precedence_chart import *
+from b_asic.port import *
+from b_asic.schema import *
+from b_asic.signal_flow_graph import *
+from b_asic.signal import *
+from b_asic.simulation import *