Make {{ block.super }} in compress management command a little more robust

[diox]

• Support multiple {% compress %} calls, with one using {{ block.super }}, inside the same {% block %}
• Support more complex inheritance chain

[bartek]

There's a problem with this pull request in that if the {% extend %} tag is using a context variable (that may switch dependent on the view using this template), the offline compression fails.

Any thoughts on this?

[diox]

Well, anything depending on a context variable can be problematic with offline compression anyway, unless it's something you can add to the COMPRESS_OFFLINE_CONTEXT.

It's probably possible to support dynamic extends, it might even already work in some cases, I haven't tested it. If you open a new bug and submit a testcase I might be able to fix it.

[bartek]

Thank you! I aded an issue here: #201