Some small cleanup to the example app's source code
Some small cleanup to the example app's source code

zhang625272514/peewee,new-xiaji/peewee,Dipsomaniac/peewee,new-xiaji/peewee,bopo/peewee,Dipsomaniac/peewee,ronyb29/peewee,bopo/peewee,lez/peewee,ghukill/peewee,jarrahwu/peewee,teserak/peewee,bopo/peewee,jnovinger/peewee,Sunzhifeng/peewee,wenxer/peewee,Sunzhifeng/peewee,fuzeman/peewee,fuzeman/peewee,giserh/peewee,wenxer/peewee,d1hotpep/peewee,d1hotpep/peewee,Sunzhifeng/peewee,giserh/peewee,py4a/peewee,zhang625272514/peewee,coleifer/peewee,coreos/peewee,new-xiaji/peewee,jarrahwu/peewee,jnovinger/peewee,zhang625272514/peewee,coleifer/peewee,mackjoner/peewee,coleifer/peewee,jarrahwu/peewee,softside/peewee,coreos/peewee,stas/peewee,Dipsomaniac/peewee,coreos/peewee