improvements to pagefromfile.py

- PageFromFileRobot extends pywikibot.Bot using an options dict
- use config.default_edit_summary setter instead of .setAction()
- change page.put() to page.save()
     and self.put() to self.save()
- "Top" and "Bottom" values are now lowercase
- fix pep8 error
  E265 block comment should start with '# '

Change-Id: Ie46eb9a003c9893a24dc01fe0b0cbf854f367187
Merge "improvements to pagefromfile.py"