Sigil 0.8.7 Released

This is a very small maintenance release. It mainly updates links for the change in code location. This release can be found here. The sha256sum of the checksum file is ec03bb7b586a4963fb9ac1ac22ae72c76360915775c0af631ce8e2da341aa0eb.

Also, this is the last release that will have the Mac package signed by John Schember.