tagging the branch for mpl 0.99.1 release

The relevant bugs on the tracker have been addressed and I just did a
round of testing on the release branch and it looks like we are good
to go for 0.99.1. Unless something critical comes up in the next 24
hours, I'm tagging r7813 on the release branch for 0.99.1 and will
build the OS X binaries tonight. Christoph, unless you hear otherwise
in the interim, if you could build the win32 binaries from this
revision, I'll shoot for a release and announcement tomorrow.