doc: added example, module docs for behaviors/togglebutton.py
doc: added example, module docs for behaviors/togglebutton.py

aron-bordin/kivy,darkopevec/kivy,janssen/kivy,inclement/kivy,jegger/kivy,rafalo1333/kivy,vitorio/kivy,andnovar/kivy,KeyWeeUsr/kivy,CuriousLearner/kivy,aron-bordin/kivy,arlowhite/kivy,matham/kivy,kivy/kivy,kived/kivy,CuriousLearner/kivy,Cheaterman/kivy,jegger/kivy,CuriousLearner/kivy,LogicalDash/kivy,matham/kivy,autosportlabs/kivy,jegger/kivy,autosportlabs/kivy,darkopevec/kivy,arlowhite/kivy,manthansharma/kivy,LogicalDash/kivy,akshayaurora/kivy,darkopevec/kivy,KeyWeeUsr/kivy,vitorio/kivy,cbenhagen/kivy,kivy/kivy,bionoid/kivy,andnovar/kivy,janssen/kivy,aron-bordin/kivy,rnixx/kivy,kived/kivy,jkankiewicz/kivy,Cheaterman/kivy,manthansharma/kivy,tony/kivy,kived/kivy,jegger/kivy,akshayaurora/kivy,cbenhagen/kivy,rnixx/kivy,jkankiewicz/kivy,el-ethan/kivy,aron-bordin/kivy,arlowhite/kivy,LogicalDash/kivy,KeyWeeUsr/kivy,Cheaterman/kivy,el-ethan/kivy,andnovar/kivy,janssen/kivy,manthansharma/kivy,manthansharma/kivy,LogicalDash/kivy,bionoid/kivy,KeyWeeUsr/kivy,inclement/kivy,autosportlabs/kivy,bionoid/kivy,kivy/kivy,bionoid/kivy,Cheaterman/kivy,akshayaurora/kivy,rnixx/kivy,vitorio/kivy,rafalo1333/kivy,inclement/kivy,tony/kivy,el-ethan/kivy,jkankiewicz/kivy,cbenhagen/kivy,matham/kivy,rafalo1333/kivy,tony/kivy,janssen/kivy,jkankiewicz/kivy,matham/kivy,darkopevec/kivy