doc: added selection example for RecycleView
doc: added selection example for RecycleView

inclement/kivy,kivy/kivy,jegger/kivy,tony/kivy,Cheaterman/kivy,rafalo1333/kivy,akshayaurora/kivy,autosportlabs/kivy,darkopevec/kivy,rnixx/kivy,manthansharma/kivy,matham/kivy,jegger/kivy,darkopevec/kivy,rafalo1333/kivy,tony/kivy,akshayaurora/kivy,inclement/kivy,kived/kivy,akshayaurora/kivy,bionoid/kivy,LogicalDash/kivy,LogicalDash/kivy,Cheaterman/kivy,jkankiewicz/kivy,kivy/kivy,darkopevec/kivy,kived/kivy,janssen/kivy,tony/kivy,bionoid/kivy,autosportlabs/kivy,jkankiewicz/kivy,KeyWeeUsr/kivy,KeyWeeUsr/kivy,rnixx/kivy,manthansharma/kivy,Cheaterman/kivy,bionoid/kivy,manthansharma/kivy,bionoid/kivy,rafalo1333/kivy,matham/kivy,KeyWeeUsr/kivy,jegger/kivy,jkankiewicz/kivy,inclement/kivy,jegger/kivy,LogicalDash/kivy,Cheaterman/kivy,rnixx/kivy,kivy/kivy,KeyWeeUsr/kivy,janssen/kivy,jkankiewicz/kivy,matham/kivy,matham/kivy,LogicalDash/kivy,darkopevec/kivy,janssen/kivy,kived/kivy,autosportlabs/kivy,manthansharma/kivy,janssen/kivy