Add docs for RelativeTimeFormatter.
Add docs for RelativeTimeFormatter.

bravo-kernel/cakephp,CVO-Technologies/cakephp,cakephp-fr/cakephp,CVO-Technologies/cakephp,gmponos/cakephp,Phillaf/cakephp,jeffblack360/cakephp,berrygoudswaard/cakephp,davidyell/cakephp,garethellis36/cakephp,michaelze/cakephp,garethellis36/cakephp,davidyell/cakephp,cakephp/cakephp,petteyg/cakephp,nrother/cakephp,mvdriel/cakephp,tenkoma/cakephp,HavokInspiration/cakephp,ADmad/cakephp,ADmad/cakephp,garethellis36/cakephp,cakephp/cakephp,elboletaire/cakephp,jeffblack360/cakephp,davidyell/cakephp,ndm2/cakephp,CakeDC/cakephp,cakephp/cakephp,CakeDC/cakephp,Phillaf/cakephp,ADmad/cakephp,bravo-kernel/cakephp,cakephp-fr/cakephp,dakota/cakephp,dakota/cakephp,tenkoma/cakephp,justinyost/cakephp,ionas/cakephp,ndm2/cakephp,HavokInspiration/cakephp,dakota/cakephp,dakota/cakephp,garethellis36/cakephp,HavokInspiration/cakephp,petteyg/cakephp,ionas/cakephp,petteyg/cakephp,tenkoma/cakephp,michaelze/cakephp,thinkingmedia/cakephp,thinkingmedia/cakephp,justinyost/cakephp,thinkingmedia/cakephp,justinyost/cakephp,berrygoudswaard/cakephp,cakephp-fr/cakephp,tgr0ss/cakephp,jeffblack360/cakephp,gmponos/cakephp,michaelze/cakephp,bravo-kernel/cakephp,gmponos/cakephp,ADmad/cakephp,elboletaire/cakephp,CakeDC/cakephp,petteyg/cakephp,tenkoma/cakephp,cakephp/cakephp,CVO-Technologies/cakephp,mvdriel/cakephp,nrother/cakephp,Phillaf/cakephp,mvdriel/cakephp,tgr0ss/cakephp,ndm2/cakephp,ionas/cakephp,berrygoudswaard/cakephp,tgr0ss/cakephp,CakeDC/cakephp,nrother/cakephp,ndm2/cakephp,mvdriel/cakephp,elboletaire/cakephp