Merge pull request !106 from wenkai/wk02_cache_3cp1

2. Optimize the python api of graph and graph_processor
3. delete unconnected const and parameter nodes
4. fix subnode count bug and fix name scope node have not input and output bug
5. add cyclic graph and high degree graph json file
6. update parameter node to polymeric scope node
7. delele all deepcopy to improve performance
8. add data type and update the attribute scope of edge to independtend_layout
9. add add_parameter_nodes function
10. delete scope attribute in input and optimiza code
11. parse parameter data type and shape
12. fix ut and st for graph
13. fix pylint
14. fix pylint arguments-differ
15. add scope proxy node instead of node