cookbook: add support for recipes in sub-directories
cookbook: add support for recipes in sub-directories

fluendo/cerbero,justinjoy/cerbero,EricssonResearch/cerbero,davibe/cerbero,shoreflyer/cerbero,sdroege/cerbero,ylatuya/cerbero,GStreamer/cerbero,jackjansen/cerbero,fluendo/cerbero,davibe/cerbero,justinjoy/cerbero,fluendo/cerbero,centricular/cerbero,jackjansen/cerbero-2013,shoreflyer/cerbero,ford-prefect/cerbero,brion/cerbero,cee1/cerbero-mac,shoreflyer/cerbero,sdroege/cerbero,OptoFidelity/cerbero,ramaxlo/cerbero,EricssonResearch/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,AlertMe/cerbero,jackjansen/cerbero-2013,justinjoy/cerbero,ford-prefect/cerbero,atsushieno/cerbero,nirbheek/cerbero,atsushieno/cerbero,justinjoy/cerbero,BigBrother-International/gst-cerbero,superdump/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,nirbheek/cerbero,flexVDI/cerbero,jackjansen/cerbero-2013,AlertMe/cerbero,OptoFidelity/cerbero,lubosz/cerbero,EricssonResearch/cerbero,nzjrs/cerbero,ikonst/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,centricular/cerbero,atsushieno/cerbero,fluendo/cerbero,jackjansen/cerbero-2013,lubosz/cerbero,BigBrother-International/gst-cerbero,ramaxlo/cerbero,nzjrs/cerbero,ylatuya/cerbero,jackjansen/cerbero,centricular/cerbero,nicolewu/cerbero,atsushieno/cerbero,ikonst/cerbero,OptoFidelity/cerbero,superdump/cerbero,flexVDI/cerbero,nirbheek/cerbero-old,brion/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,EricssonResearch/cerbero,ikonst/cerbero,GStreamer/cerbero,davibe/cerbero,superdump/cerbero,GStreamer/cerbero,ramaxlo/cerbero,sdroege/cerbero,multipath-rtp/cerbero,multipath-rtp/cerbero,ikonst/cerbero,AlertMe/cerbero,atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,GStreamer/cerbero,nirbheek/cerbero-old,davibe/cerbero,OptoFidelity/cerbero,ylatuya/cerbero,sdroege/cerbero,multipath-rtp/cerbero,nzjrs/cerbero,nirbheek/cerbero-old,superdump/cerbero,ikonst/cerbero,sdroege/cerbero,flexVDI/cerbero,lubosz/cerbero,ford-prefect/cerbero,jackjansen/cerbero,ramaxlo/cerbero,brion/cerbero,jackjansen/cerbero-2013,centricular/cerbero,nicolewu/cerbero,nirbheek/cerbero-old,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,brion/cerbero,brion/cerbero,ramaxlo/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,fluendo/cerbero,nzjrs/cerbero,ford-prefect/cerbero,EricssonResearch/cerbero,ylatuya/cerbero,nirbheek/cerbero,shoreflyer/cerbero,AlertMe/cerbero,multipath-rtp/cerbero,flexVDI/cerbero,shoreflyer/cerbero,BigBrother-International/gst-cerbero,jackjansen/cerbero,nirbheek/cerbero,flexVDI/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,BigBrother-International/gst-cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,nzjrs/cerbero,cee1/cerbero-mac,cee1/cerbero-mac,nicolewu/cerbero,BigBrother-International/gst-cerbero,lubosz/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,multipath-rtp/cerbero,centricular/cerbero,GStreamer/cerbero,cee1/cerbero-mac,AlertMe/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero