function list is sorted reversely

[manni]

The function list for Perl files is sorted in reverse order. The culprit seems to be line 98 of Padre::Document::Perl.

Ideally, the user should have the option to get a sorted function list or a list in which functions appear in the order they are found in the file.

[szabgab]

r1543 fixed the bug and implemented the feature to allow the user to select
the order.