Update advance.rst
Update advance.rst

Added documentation for easy and clean way to disable create/delete functionality for some Admin Class
dmarkowicz/SonataAdminBundle,joshlopes/SonataAdminBundle,morfin60/SonataAdminBundle,ksom/SonataAdminBundle,0mars/SonataAdminBundle,Th3Mouk/SonataAdminBundle,amine2z/SonataAdminBundle,sonata-project/SonataAdminBundle,ju1ius/SonataAdminBundle,claudusd/SonataAdminBundle,rmzamora/SonataAdminBundle,ju1ius/SonataAdminBundle,j-ledoux/SonataAdminBundle,qsomazzi/SonataAdminBundle,fosvn/SonataAdminBundle,dankempster/SonataAdminBundle,idchlife/SonataAdminBundle,jszmidt/SonataAdminBundle,nexylan/SonataAdminBundle,idchlife/SonataAdminBundle,sonata-project/SonataAdminBundle,j-ledoux/SonataAdminBundle,0mars/SonataAdminBundle,Romashka/SonataAdminBundle,ju1ius/SonataAdminBundle,mikemeier/SonataAdminBundle,digitalkaoz/SonataAdminBundle,lightglitch/SonataAdminBundle,ossinkine/SonataAdminBundle,ellementA/SonataAdminBundle,mohebifar/SonataAdminBundle,ruscon/SonataAdminBundle,mohebifar/SonataAdminBundle,tim96/SonataAdminBundle,rswork/SonataAdminBundle,greg0ire/SonataAdminBundle,core23/SonataAdminBundle,edouardkombo/SonataAdminBundle,morgangiraud/SonataAdminBundle,vincenttouzet/SonataAdminBundle,rmzamora/SonataAdminBundle,goldbroker/SonataAdminBundle,mikemeier/SonataAdminBundle,jszmidt/SonataAdminBundle,rschumacher/SonataAdminBundle,mgdigital/SonataAdminBundle,FabienD/SonataAdminBundle,jordisala1991/SonataAdminBundle,Storke/SonataAdminBundle,vincenttouzet/SonataAdminBundle,Romashka/SonataAdminBundle,jlamur/SonataAdminBundle,digitalkaoz/SonataAdminBundle,rswork/SonataAdminBundle,ryanhughes/SonataAdminBundle,Denniskevin/SonataAdminBundle,rmzamora/SonataAdminBundle,gnorby88/SonataAdminBundle,ruscon/SonataAdminBundle,robhunt3r/SonataAdminBundle,mweimerskirch/SonataAdminBundle,ejkun/SonataAdminBundle,Denniskevin/SonataAdminBundle,lutangar/SonataAdminBundle,rschumacher/SonataAdminBundle,UnDeleteRU/SonataAdminBundle,j-ledoux/SonataAdminBundle,goldbroker/SonataAdminBundle,qsomazzi/SonataAdminBundle,ellementA/SonataAdminBundle,ellementA/SonataAdminBundle,idchlife/SonataAdminBundle,qsomazzi/SonataAdminBundle,cmacetko/SonataAdminBundle,osavchenko/SonataAdminBundle,tskorupka/SonataAdminBundle,mohebifar/SonataAdminBundle,tim96/SonataAdminBundle,gRoussac/SonataAdminBundle,binhle410/SonataAdminBundle,OskarStark/SonataAdminBundle,lightglitch/SonataAdminBundle,lightglitch/SonataAdminBundle,core23/SonataAdminBundle,mikemeier/SonataAdminBundle,robhunt3r/SonataAdminBundle,FabienD/SonataAdminBundle,gnorby88/SonataAdminBundle,osavchenko/SonataAdminBundle,ARTACK/SonataAdminBundle,gRoussac/SonataAdminBundle,joshlopes/SonataAdminBundle,digitalkaoz/SonataAdminBundle,Koc/SonataAdminBundle,morfin60/SonataAdminBundle,tim96/SonataAdminBundle,tim96/SonataAdminBundle,UnDeleteRU/SonataAdminBundle,news-life-media/SonataAdminBundle,ejkun/SonataAdminBundle,UnDeleteRU/SonataAdminBundle,tskorupka/SonataAdminBundle,Armstrong1992/SonataAdminBundle,gnorby88/SonataAdminBundle,Storke/SonataAdminBundle,robhunt3r/SonataAdminBundle,OskarStark/SonataAdminBundle,ruscon/SonataAdminBundle,arbislimen/SonataAdminBundle,binhle410/SonataAdminBundle,ossinkine/SonataAdminBundle,Soullivaneuh/SonataAdminBundle,morfin60/SonataAdminBundle,mikemeier/SonataAdminBundle,ksom/SonataAdminBundle,joshlopes/SonataAdminBundle,Koc/SonataAdminBundle,greg0ire/SonataAdminBundle,greg0ire/SonataAdminBundle,binhle410/SonataAdminBundle,morfin60/SonataAdminBundle,binhle410/SonataAdminBundle,Denniskevin/SonataAdminBundle,lutangar/SonataAdminBundle,claudusd/SonataAdminBundle,lutangar/SonataAdminBundle,cmacetko/SonataAdminBundle,andythorne/SonataAdminBundle,ARTACK/SonataAdminBundle,jordisala1991/SonataAdminBundle,news-life-media/SonataAdminBundle,qsomazzi/SonataAdminBundle,tskorupka/SonataAdminBundle,morgangiraud/SonataAdminBundle,jakublech/SonataAdminBundle,fosvn/SonataAdminBundle,ejkun/SonataAdminBundle,osavchenko/SonataAdminBundle,tunne/SonataAdminBundle,nexylan/SonataAdminBundle,jszmidt/SonataAdminBundle,arbislimen/SonataAdminBundle,andythorne/SonataAdminBundle,morgangiraud/SonataAdminBundle,j-ledoux/SonataAdminBundle,ksom/SonataAdminBundle,ossinkine/SonataAdminBundle,news-life-media/SonataAdminBundle,OskarStark/SonataAdminBundle,Storke/SonataAdminBundle,rswork/SonataAdminBundle,robhunt3r/SonataAdminBundle,0mars/SonataAdminBundle,goldbroker/SonataAdminBundle,jakublech/SonataAdminBundle,ryanhughes/SonataAdminBundle,ARTACK/SonataAdminBundle,mweimerskirch/SonataAdminBundle,Denniskevin/SonataAdminBundle,edouardkombo/SonataAdminBundle,greg0ire/SonataAdminBundle,ju1ius/SonataAdminBundle,dmarkowicz/SonataAdminBundle,osavchenko/SonataAdminBundle,amine2z/SonataAdminBundle,Koc/SonataAdminBundle,fosvn/SonataAdminBundle,Romashka/SonataAdminBundle,goldbroker/SonataAdminBundle,FabienD/SonataAdminBundle,digitalkaoz/SonataAdminBundle,Koc/SonataAdminBundle,edouardkombo/SonataAdminBundle,vincenttouzet/SonataAdminBundle,Th3Mouk/SonataAdminBundle,ellementA/SonataAdminBundle,peter-gribanov/SonataAdminBundle,mohebifar/SonataAdminBundle,amine2z/SonataAdminBundle,cmacetko/SonataAdminBundle,dmarkowicz/SonataAdminBundle,amine2z/SonataAdminBundle,mgdigital/SonataAdminBundle,tunne/SonataAdminBundle,UnDeleteRU/SonataAdminBundle,Th3Mouk/SonataAdminBundle,jlamur/SonataAdminBundle,morgangiraud/SonataAdminBundle,core23/SonataAdminBundle,morfin60/SonataAdminBundle,dankempster/SonataAdminBundle,arbislimen/SonataAdminBundle,rmzamora/SonataAdminBundle,osavchenko/SonataAdminBundle,j-ledoux/SonataAdminBundle,jlamur/SonataAdminBundle,lutangar/SonataAdminBundle,peter-gribanov/SonataAdminBundle,rschumacher/SonataAdminBundle,jszmidt/SonataAdminBundle,tunne/SonataAdminBundle,mweimerskirch/SonataAdminBundle,ruscon/SonataAdminBundle,news-life-media/SonataAdminBundle,cmacetko/SonataAdminBundle,gnorby88/SonataAdminBundle,Romashka/SonataAdminBundle,UnDeleteRU/SonataAdminBundle,edouardkombo/SonataAdminBundle,andythorne/SonataAdminBundle,ejkun/SonataAdminBundle,jlamur/SonataAdminBundle,dmarkowicz/SonataAdminBundle,rschumacher/SonataAdminBundle,dmarkowicz/SonataAdminBundle,fosvn/SonataAdminBundle,Soullivaneuh/SonataAdminBundle,idchlife/SonataAdminBundle,ksom/SonataAdminBundle,dankempster/SonataAdminBundle,Soullivaneuh/SonataAdminBundle,Storke/SonataAdminBundle,gRoussac/SonataAdminBundle,tunne/SonataAdminBundle,jordisala1991/SonataAdminBundle,jakublech/SonataAdminBundle,peter-gribanov/SonataAdminBundle,arbislimen/SonataAdminBundle,ellementA/SonataAdminBundle,Romashka/SonataAdminBundle,ryanhughes/SonataAdminBundle,OskarStark/SonataAdminBundle,nexylan/SonataAdminBundle,mweimerskirch/SonataAdminBundle,jlamur/SonataAdminBundle,andythorne/SonataAdminBundle,ossinkine/SonataAdminBundle,news-life-media/SonataAdminBundle,lightglitch/SonataAdminBundle,Soullivaneuh/SonataAdminBundle,rswork/SonataAdminBundle,mgdigital/SonataAdminBundle,ejkun/SonataAdminBundle,Th3Mouk/SonataAdminBundle,core23/SonataAdminBundle,mgdigital/SonataAdminBundle,dankempster/SonataAdminBundle,FabienD/SonataAdminBundle,jordisala1991/SonataAdminBundle,jakublech/SonataAdminBundle,gRoussac/SonataAdminBundle,tskorupka/SonataAdminBundle,peter-gribanov/SonataAdminBundle,ARTACK/SonataAdminBundle,binhle410/SonataAdminBundle,vincenttouzet/SonataAdminBundle,Armstrong1992/SonataAdminBundle,nexylan/SonataAdminBundle,0mars/SonataAdminBundle,claudusd/SonataAdminBundle,ryanhughes/SonataAdminBundle,joshlopes/SonataAdminBundle,claudusd/SonataAdminBundle