[BUGFIX] code improvements + pep8 changes

- fix for catTitle in CategoryTidyRobot.run()
- remove obsolete site in CategoryMoveRobot constructor
- remove obsolete restore variable in main()
- PEP8 changes E501

Change-Id: Ide3d7de833b4cebb200261d25902d6592d38083c
Merge "[BUGFIX] code improvements + pep8 changes"