Remove obsolete imports.
Self-tests for regex matching.

Also tighten exception handling around file opening.
remove unwanted characters, like spaces from tag name
Merge pull request #125 from dmitry84/master

remove unwanted characters, like spaces from tag name
Don't include : as allowed character after link.

It should be, but we have code that generates this text
from cf-sketch and leads to false positives.
Implement support for simplified linking inside same document.

[text][#section] becomes [text][current_title#section]
Removed unneeded reference to deleted image file
Merge pull request #126 from michaelclelland/master

Removed unneeded reference to deleted image file
Fix a bunch of hardcoded link locations.

Some pages moved on website, and helping the auto-linker out with
default link targets.
Use new, smaller logo.