Added docs for apply
Added docs for apply

kirbyfan64/hy,michel-slm/hy,tianon/hy,paultag/hy,farhaven/hy,larme/hy,Tritlo/hy,adamfeuer/hy,aisk/hy,jakirkham/hy,timmartin/hy,aisk/hy,gilch/hy,tianon/hy,ALSchwalm/hy,zackmdavis/hy,Foxboron/hy,larme/hy,farhaven/hy,larme/hy,mtmiller/hy,tuturto/hy,tianon/hy,kirbyfan64/hy,Foxboron/hy,algernon/hy,kartikm/hy,farhaven/hy,aisk/hy,freezas/hy