use THEANOFLAGS=profiling.min_peak_memory=True to set it on

remove an unused line

Fix max memory counter.

Fix algo. I added a todo. I'll make other comments in the PR.

Add TensorConstant check in check_node_state method.

refactor test and print the line to check with the expected answer.

increase the complexity of test.

1. remove compute_map.copy from vm.py
2. add new compute_map in compile.py
3. make code more simple

1. remove global variables
2. modify discription
3. use new way to track order