Don't fix URIs

We want the raw value.  This causes ' http://www.google.com' to change to '%20http://www.google.com'.
Don't fix backslashes in URLs by default.

This open, on by default, converts '\' in URLs to '/'.  We don't want the URLs we find to be changed at this point.
Make the tidy config customizable
Test for trailing spaces

see https://github.com/UNLSiteMaster/site_master/issues/57
Merge remote-tracking branch 'upstream/master' into trim-uris
Update tests to include new URL

A URL was added to the example page to check for whitespace.
Merge pull request #29 from mfairchild365/trim-uris

Trim whitespace from found uris