update defaults for FlowLayout. Fixes #49
update defaults for FlowLayout. Fixes #49
godLoveLucifer/PSTCollectionView,zace-yuan/PSTCollectionView,ba01ei/PSTImprovedCollectionView,Anish-kumar-dev/PSTCollectionView,steipete/PSTCollectionView,niuxinghua/PSTCollectionView,zjh171/PSTCollectionView,jianwoo/PSTCollectionView,CorzFree/PSTCollectionView,Kevin775263419/PSTCollectionView,Amnysia/PSTCollectionView,thevuuranusls/PSTCollectionView,StephaneDelcroix/PSTCollectionView,StephaneDelcroix/PSTCollectionView