Re-implement fixtures in directories.
Re-implement fixtures in directories.

The changes done in #3005 were lost in a merge conflict between 2.x and
3.0. This re-implements those changes.

yinhe007/cakephp,erikfig/cakephp,akintoey/cakephp,jerems02/cakephp,khoimt/cakephp-study,jeffblack360/cakephp,petteyg/cakephp,eboominathan/cakephp,adopico/cakephp,petteyg/cakephp,jerems02/cakephp,Balachan27/cakephp,ADmad/cakephp,berrygoudswaard/cakephp,michaelze/cakephp,khoimt/cakephp-study,dakota/cakephp,CakeDC/cakephp,CVO-Technologies/cakephp,tgr0ss/cakephp,eryw/cakephp,jeffblack360/cakephp,Balachan27/cakephp,yinhe007/cakephp,cakephp/cakephp,tisu2tisu/cakephp,ADmad/cakephp,adopico/cakephp,pbaire/cakephp,jjj117/cakephp,mvdriel/cakephp,dakota/cakephp,bravo-kernel/cakephp,erikfig/cakephp,CakeDC/cakephp,justinyost/cakephp,timhoeppner/cakephp,nrother/cakephp,kumamidori/cakephp,garethellis36/cakephp,gmponos/cakephp,dakota/cakephp,web-player/cakephp,kumamidori/cakephp,eboominathan/cakephp,mvdriel/cakephp,gmponos/cakephp,CakeDC/cakephp,ADmad/cakephp,dkarvounaris/cakephp,Balachan27/cakephp,ionas/cakephp,tisu2tisu/cakephp,davidyell/cakephp,jjj117/cakephp,tgr0ss/cakephp,garethellis36/cakephp,michaelze/cakephp,eboominathan/cakephp,nrother/cakephp,gmponos/cakephp,CakeDC/cakephp,thinkingmedia/cakephp,cakephp-fr/cakephp,cakephp-fr/cakephp,tgr0ss/cakephp,yinhe007/cakephp,jerems02/cakephp,cakephp/cakephp,justinyost/cakephp,cakephp-fr/cakephp,ndm2/cakephp,dkarvounaris/cakephp,elboletaire/cakephp,mvdriel/cakephp,eryw/cakephp,HavokInspiration/cakephp,justinyost/cakephp,jjj117/cakephp,petteyg/cakephp,bravo-kernel/cakephp,Phillaf/cakephp,burriko/cakephp,ionas/cakephp,tenkoma/cakephp,nrother/cakephp,erikfig/cakephp,garethellis36/cakephp,ndm2/cakephp,HavokInspiration/cakephp,tenkoma/cakephp,pbaire/cakephp,Phillaf/cakephp,tisu2tisu/cakephp,HavokInspiration/cakephp,michaelze/cakephp,bravo-kernel/cakephp,dkarvounaris/cakephp,Phillaf/cakephp,tenkoma/cakephp,cakephp/cakephp,ndm2/cakephp,davidyell/cakephp,akintoey/cakephp,CVO-Technologies/cakephp,ionas/cakephp,berrygoudswaard/cakephp,adopico/cakephp,mvdriel/cakephp,berrygoudswaard/cakephp,web-player/cakephp,burriko/cakephp,thinkingmedia/cakephp,petteyg/cakephp,cakephp/cakephp,timhoeppner/cakephp,tenkoma/cakephp,akintoey/cakephp,jeffblack360/cakephp,khoimt/cakephp-study,thinkingmedia/cakephp,burriko/cakephp,garethellis36/cakephp,dakota/cakephp,davidyell/cakephp,ADmad/cakephp,kumamidori/cakephp,web-player/cakephp,pbaire/cakephp,elboletaire/cakephp,eryw/cakephp,elboletaire/cakephp,timhoeppner/cakephp,ndm2/cakephp,CVO-Technologies/cakephp