liboggedit build framework

This request contains the oggedit code and makefile changes, just to make sure the directory and build is all OK for you.  There are no calls to the oggedit library from flac or vorbis (so I guess any build binary would just discard oggedit for now).  make generates some warnings about static linking, but I think they are OK in this context.

When the build is OK I can submit the changes to the Flac and Vorbis plugins.