Add maintainer instructions to README for now.
Add maintainer instructions to README for now.

 * TODO We need a separate place (and preferably git repo for maintainer
   docs, scripts, etc.). I've started putting these things in maint/ in
   the top-level of bridgedb.git, but since I think that service
   maintainance should be kept separate from the software maintainance,
   I haven't committed them yet. That said, here are the instructions
   for bumping versions, for lack of a better place to put them.

mmaker/bridgedb,pagea/bridgedb,mmaker/bridgedb,wfn/bridgedb,wfn/bridgedb,pagea/bridgedb