Update `.gitignore`

Update `.gitignore` from
`https://github.com/github/gitignore/blob/master/Python.gitignore`.

Modify `.gitignore` to include `bin/` and exclude some tmp files.#bin/
Add `bin/symoro-bin` python script

Add `bin/symoro-bin` python script. This script is to replace
`pysymoro/main.py` over time.
Add `setup.py` file

Add `setup.py` file. The current version does not include all the
information but provides sufficient to get things rolling.

Update `pysymoro/main.py` to include `__name__` check and call
`main()` accordingly.