0.4

Announcement

This release is the beginning of a complete rewrite of pgf-pie to make it
portable to other formats and to fix bugs that originate from its design.

Bug fixes

This release also includes other bug fixes. On GitHub you can click the commit
hashes and the issue numbers to get to the fix and the ticket, respectively.

a7a883c #5
6e38480 #6
c279e95 #2