[patch]Template improvements

[rjwittams]

• Multiple args for filters,comma separated including varargs . Changed removetags filter to use it and put the old version in old_filters template library for people who do not want to fix all thier templates. You can load it in templates, or use template.add_to_builtins('django.template_tags.old_filters') in your settings file to apply it universally. Are there any other filters that should use it?

• Integers and float literals in resolve_variable . I didn't know what the this should mean for 'add' and the like, so left as is.

• Fixed standalone template tests to work with the testapp - so all tests pass in all situations.

• Added a 'lookup' filter, useful now vars work in templates. {{my_dict|lookup:my_index}} for example - a common mailing list request.

[rjwittams]

I messed around with formatfilesize as well. Not sure about that bit to be honest.

[rjwittams]

update

[rjwittams]

Removetags will now work either way, so no need for old_filters.

[Adrian Holovaty]

(In [1690]) Changed resolve_variable to resolve integers and floats as integers and floats. Added ifequal unit tests. Refs #959

[Jacob]

This is too much of a laundry-list for a single ticket (and I suspect that some of this stuff is different at this point). Please re-open individual tickets if any still apply.