add tabstop option for hard tabs (works for github/gist)
Hard-tab-indented source code, when displayed by Github/Gist, has hard tabs
(\ts) displayed in the browser as-is, which are usually rendered as 8 spaces
in modern browsers. This is often undesirable (especially for golang code,
where the standard specifies 4-space hard tabs).
After an ignored feature request of user-changeable tabstop to Github, I decided to implement this as a userscript instead.
EDIT: Although github sort of added the feature through an obsecure query string, I still find it helpful.
Enjoy!
