Display arbitrary models

Template tag for displaying a list of arbitrary models. Useful for life-stream kind of pages that display blog entries, links, photos etc ordered by date. Example

Usage: something like:

{% for object in object_list %}
    {% display_excerpt object %}
{% endfor %}

Will look for app/model_excerpt.html by default, and fall back on a generic display_excerpt.html, or returns the object's string representation as a last fallback.

display_excerpt.html might look something like:

<a href="{{ object.get_absolute_url }}">{{ object }}</a>

Any model you throw at it should have a get_absolute_url and a string representation of some sort, so this gives you the bare minimum of a title and a link to a detail page.

display_excerpt takes an optional argument to set the template suffix. This might be handy for generating different formatting for feeds, for instance:

{% for object in object_list %}
    {% display_excerpt object "feed" %}
{% endfor %}

This will look for app/model_feed.html to render the object.

Got lots of help from mattmcc on #django for this one, thanks!