Split up unmaintained ebuilds into separate overlays

[Dr-Terrible]

To avoid cluttering this repository, all the ebuilds about abandoned/unmaintained packages should be moved into a separate overlay (the place where ebuilds go to die): https://github.com/Dr-Terrible/graveyard-overlay

Let's trim the fat!

• [x] dev-util/flint
• [x] x11-base/xynth
• [x] dev-ruby/feedzirra
• [x] dev-ruby/god
• [x] dev-ruby/gorillib
• [x] dev-ruby/loofah
• [x] dev-ruby/sax-machine
• [x] dev-ruby/certificate_authority
• [x] dev-python/django-fields
• [x] dev-python/django-haystack
• [x] dev-python/django-muddle-users
• [x] dev-python/django-object-log
• [x] dev-python/django-object-permissions
• [x] dev-python/ganeti-webmgr-layout
• [x] dev-python/inflection
• [x] dev-python/muddle
• [x] dev-python/ordereddict
• [x] dev-python/plugnplay
• [x] dev-python/smartypants
• [x] app-editors/atom-bin
• [x] www-servers/mongrel
• [x] www-servers/wsgid
• [x] app-doc/dexy (and all its dependencies)

Games that should be moved into the games-overlay:

• [x] games-strategy/wesnoth (mostly fixes)
• [ ] games-strategy/ufo-ai
• [x] ~games-strategy/endless-sky~
• [ ] games-rpg/flare

[bpinto]

You are almost there @Dr-Terrible :)