Added supported Cython Version to 0.26
Added supported Cython Version to 0.26

kivy doesnot compile with the recent Cython 0.27.x in OSX hence reverting to the 0.26.x version
Cheaterman/kivy,jegger/kivy,akshayaurora/kivy,Cheaterman/kivy,matham/kivy,akshayaurora/kivy,jegger/kivy,kivy/kivy,LogicalDash/kivy,KeyWeeUsr/kivy,bionoid/kivy,bionoid/kivy,LogicalDash/kivy,KeyWeeUsr/kivy,LogicalDash/kivy,inclement/kivy,bionoid/kivy,KeyWeeUsr/kivy,bionoid/kivy,rnixx/kivy,Cheaterman/kivy,inclement/kivy,Cheaterman/kivy,matham/kivy,kivy/kivy,jegger/kivy,rnixx/kivy,matham/kivy,akshayaurora/kivy,inclement/kivy,matham/kivy,jegger/kivy,LogicalDash/kivy,rnixx/kivy,KeyWeeUsr/kivy,kivy/kivy