Feature Request: gitignore recursion

[AJ <alljeep@gmail.com>]

I'm hoping to get the following feature implemented into git.

Add the ability to recursively include using:
!/my_dir/**/*

Currently, in order to include a directory with multiple sub-directories
within a excluded directory, you must do the following:
!/my_dir/
!/my_dir/*
!/my_dir/*/*
!/my_dir/*/*/*
!/my_dir/*/*/*/*
!/my_dir/*/*/*/*/*

Here is a use case:
When developing a WordPress site you typically only place the wp-content/themes
directory under version control. Once you start adding custom plugins, README
files, and a task manager like Grunt JS, you then have to starting getting
creative with your .gitignore if your .git directory is in the web root
directory.

Here is an example:
https://gist.github.com/AJ-Acevedo/6859779

Thanks for taking the time to consider this feature
AJ