Change the run_all.sh from bash to python

[shuaimu]

The scripts in run_all.sh are not tiny jobs of just calling commands. Many of the codes are doing complex jobs such collecting stats and calculating, which would be easier to maintain and less error-prone if we can change it to a more proper script language such as python before it gets even any bigger.

bash2py seems a good tool helping the transformation.

[shuaimu]

or to ruby. I am swinging