Titles with `/` fail to create standalone entries

[LukeSmithxyz]

Noting this here because I can't deal with it right now.

I noticed that while titles with / work with the RSS feed, rolling blog, etc., they do not properly output to the blog/ folder as standalone entries.

It's a problem with sed, the / should be escaped. I'll fix this elegantly when I get the chance, but if anyone else wants to do a PR first, you're welcome to.

[michaeltd]

You can experiment with sed's field separator, it could be any one character given that it's escaped in the expressions themselves, when you are dealing with paths (lots of '/'), it's a good idea to use a different character (eg '|'?).

[LukeSmithxyz]

This problem should be irrelevant given the most recent revamp.