Add "appendable" blocks to the current "overrideable" ones

[GomoX <gomo AT datafull DOT com>]

It would be nice to have a block tag where you can append to the current contents of the block, instead of replacing them. This is useful if you need to add a JS file for your template, and the parent template block already has useful links in it (most likely because it overrided yet another parent template). Since you can have nested inheritance, this make preserving whatever the inmediate parent set possible.

[Adrian Holovaty]

Check out block.super.

​http://www.djangoproject.com/documentation/templates/#template-inheritance

If you need to get the content of the block from the parent template, the {{ block.super }} variable will do the trick. This is useful if you want to add to the contents of a parent block instead of completely overriding it.