Cleanup Code about circuits

[spaceone]

Let's also remove the "#Package: , #Date: ..., #Author: ..." header. It's untypically for python projects.

[spaceone]

Make sure to use "git diff -w" after autopep8 → in some scenarios it breaks code.

[prologic]

$ tox
...
_____________________________________________ summary ______________________________________________
  docs: commands succeeded
  py26: commands succeeded
  py27: commands succeeded
  py32: commands succeeded
  py33: commands succeeded
  py34: commands succeeded
  pypy: commands succeeded
  congratulations :)

:)

[prologic]

Re header comments; done :)

[prologic]

Even with 65bb0c9:

$ time tox -r
_____________________________________________ summary ______________________________________________
  docs: commands succeeded
  py26: commands succeeded
  py27: commands succeeded
  py32: commands succeeded
  py33: commands succeeded
  py34: commands succeeded
  pypy: commands succeeded
  congratulations :)

real    15m7.833s
user    3m12.971s
sys 0m10.452s

[prologic]

So if there are no other objections; I'll merge this in:

[prologic]

I'll also run the codebase through autoflake

[prologic]

Going forward (if you haven't seen already) landscape will ensure that we continue to maintain good code quality :)