create setup.py and support system install

[blshkv]

It is common for any distribution to install a tool in a system location. tinfoleak seems design only to be ran from a current folder. Please enhance it. Here is the official python documentation https://docs.python.org/2/distutils/setupscript.html but there is a bigger problem.
The tool should follow Linux Filesystem Hierarchy Standard (FHS) directory structure in order to archive this.