Removing getURL($new) silliness; reinstating getURL()

Fixes #171
URLs with fragments are now properly parsed for webmentions.

Fragment is available to parsed pages as $page->getInput(‘#’); - for
example if you want to add a webmention to a specific portion of a
piece of video or audio media (hint hint).

Fixes #172
Robots.txt and Humans.txt

Extensible via the txt/robots and txt/humans templates.

Fixes #169
text/plain mimetype.
Access-controlled content now forwards to the login page if you're logged out
Merge pull request #1 from idno/master

IDNO core changes