Additions & refinements.
Removed bug from nautilus.css
Merge pull request #35 from seanmavley/master

.py files made PEP8 compliant & Rename of .py files.
Re-added hyphens.
Updated button styles.
Refined button styles.
Bug fixes & refinements.
Tweaked titlebars.
Tabs in nautilus no more transparent, issue https://github.com/snwh/paper-gtk-theme/issues/32
Merge remote-tracking branch 'upstream/master'