#Custom Article URLs#

Adds support for defining different default urls for different categories, or 
different subcategories if using the subcategory plugin.

##Usage##

After adding `custom_article_urls` to your `PLUGINS` add a `CUSTOM_ARTICLE_URLS`
setting, which is a dictionary of rules. The rules are also a dictionary,
consisting of the `URL` and the `SAVE_AS` values. 

For example, if you had two categories, Category 1 and Category 2 and you
would like Category 1 saved as category-1/article-slug/ and Category 2 saved as
/year/month/article-slug/ you would add:

    CUSTOM_ARTICLE_URLS = {
        'Category 1': {'URL': '{category}/{slug}/,
            'SAVE_AS': '{category}/{slug}/index.html},
        'Category 2': {'URL': '{date:%Y}/{date:%B}/{slug}/,
            'SAVE_AS': '{date:%Y}/{date:%B}/{slug}/index.html},
        }

If had any other categories they would use the default `ARTICLE_SAVE_AS`
and `ARTICLE_URL`

If you are using the subcategory plugin, you can define them the same way.
For example if Category 1 had a subcategory Sub Category you could define
it's rules with

    'Category 1/Sub Category`: ...

##Other Usage: Article Metadata##

If you define a url and save_as in your articles metadata, then this plugin
will not alter that value. So you can still specify special one off urls as 
normal.