Nicer representation of titles with non-ASCII in the path

[Cook879]

Currently words like café look incomplete, as in the path that becomes caf.

Text::Unidecode takes the non-ASCII characters and finds the equivalent, so café will become cafe.

Also works for other characters sets (Greek, Russian, Chinese, etc). Right now a title of 北亰 results in no path being generated, with this change the path is bei-jing.

[Cook879]

Changes are in 847a735

Mostly tested code in a different context (I have a copy of the method from here), however I did install easy_pages and do some tests which seem fine

[drn05r]

I was trying to add a path for my page with underscores but these were automatically removed. It looks like hyphens work instead but this needs to better explained in path help text.