[photos] Assign the _loading ivar in setLoading:
[photos] Assign the _loading ivar in setLoading:

Closes #343.
jverkoey/nimbus,JyHu/nimbus,compositeprimes/nimbus,SuPair/nimbus,Guokr1991/nimbus,veue/nimbus,liuwu/nimbus,LcongGitHub/nimbus,LcongGitHub/nimbus,bangquangvn/nimbus,bogardon/nimbus,treejames/nimbus,michaelShab/nimbus,mohsinalimat/nimbus,djMax/nimbus,marcobgoogle/nimbus,chanffdavid/nimbus,cnbin/nimbus,treejames/nimbus,kviksilver/nimbus,bangquangvn/nimbus,dieface/nimbus,mohsinalimat/nimbus,0xced/nimbus,tranhieutt/nimbus,hanangellove/nimbus,kviksilver/nimbus,chanffdavid/nimbus,zaichang/nimbus,WeeTom/nimbus,JyHu/nimbus,JyHu/nimbus,kisekied/nimbus,dmishe/nimbus,veue/nimbus,dachaoisme/nimbus,Arcank/nimbus,mohsinalimat/nimbus,michaelShab/nimbus,veue/nimbus,marcobgoogle/nimbus,hanangellove/nimbus,compositeprimes/nimbus,ycaihua/nimbus,hanangellove/nimbus,cnbin/nimbus,dachaoisme/nimbus,Guokr1991/nimbus,Arcank/nimbus,xiaohongjun0509/nimbus,Guokr1991/nimbus,JyHu/nimbus,zilaiyedaren/nimbus,quyixia/nimbus,cnbin/nimbus,DreamHill/nimbus,treejames/nimbus,tranhieutt/nimbus,0xced/nimbus,DreamHill/nimbus,ycaihua/nimbus,treejames/nimbus,kisekied/nimbus,andaluz/nimbus,Guokr1991/nimbus,andaluz/nimbus,Arcank/nimbus,zaichang/nimbus,bogardon/nimbus,compositeprimes/nimbus,chanffdavid/nimbus,kisekied/nimbus,kviksilver/nimbus,panume/nimbus,bogardon/nimbus,kisekied/nimbus,hanangellove/nimbus,cnbin/nimbus,dachaoisme/nimbus,cnbin/nimbus,zilaiyedaren/nimbus,michaelShab/nimbus,Arcank/nimbus,panume/nimbus,quyixia/nimbus,bangquangvn/nimbus,WeeTom/nimbus,Guokr1991/nimbus,0xced/nimbus,bangquangvn/nimbus,xiaohongjun0509/nimbus,DreamHill/nimbus,SuPair/nimbus,hanangellove/nimbus,dmishe/nimbus,jverkoey/nimbus,djMax/nimbus,ycaihua/nimbus,liuwu/nimbus,tranhieutt/nimbus,dieface/nimbus,SuPair/nimbus,LcongGitHub/nimbus,WeeTom/nimbus,veue/nimbus,ycaihua/nimbus,marcobgoogle/nimbus,ycaihua/nimbus,xiaohongjun0509/nimbus,jverkoey/nimbus,andaluz/nimbus,bangquangvn/nimbus,Guokr1991/nimbus,dachaoisme/nimbus,dmishe/nimbus,panume/nimbus,michaelShab/nimbus,compositeprimes/nimbus,liuwu/nimbus,jverkoey/nimbus,DreamHill/nimbus,djMax/nimbus,cnbin/nimbus,WeeTom/nimbus,kisekied/nimbus,panume/nimbus,Arcank/nimbus,treejames/nimbus,marcobgoogle/nimbus,dachaoisme/nimbus,DreamHill/nimbus,dieface/nimbus,Arcank/nimbus,quyixia/nimbus,dmishe/nimbus,quyixia/nimbus,andaluz/nimbus,dieface/nimbus,quyixia/nimbus,djMax/nimbus,chanffdavid/nimbus,xiaohongjun0509/nimbus,weiyanwu1984/nimbus,andaluz/nimbus,zaichang/nimbus,djMax/nimbus,quyixia/nimbus,chanffdavid/nimbus,weiyanwu1984/nimbus,zilaiyedaren/nimbus,veue/nimbus,weiyanwu1984/nimbus,weiyanwu1984/nimbus,dmishe/nimbus,djMax/nimbus,dieface/nimbus,xiaohongjun0509/nimbus,mohsinalimat/nimbus,weiyanwu1984/nimbus,bogardon/nimbus,liuwu/nimbus,compositeprimes/nimbus,JyHu/nimbus,michaelShab/nimbus,LcongGitHub/nimbus,panume/nimbus,tranhieutt/nimbus,zilaiyedaren/nimbus,liuwu/nimbus,WeeTom/nimbus,bogardon/nimbus,michaelShab/nimbus,ycaihua/nimbus,JyHu/nimbus,SuPair/nimbus,0xced/nimbus,JyHu/nimbus,jverkoey/nimbus,xiaohongjun0509/nimbus,bangquangvn/nimbus,marcobgoogle/nimbus,weiyanwu1984/nimbus,dieface/nimbus,bogardon/nimbus,dmishe/nimbus,Arcank/nimbus,bogardon/nimbus,tranhieutt/nimbus,0xced/nimbus,marcobgoogle/nimbus,zaichang/nimbus,dachaoisme/nimbus,compositeprimes/nimbus,kviksilver/nimbus,LcongGitHub/nimbus,liuwu/nimbus,LcongGitHub/nimbus,panume/nimbus,jverkoey/nimbus,DreamHill/nimbus,chanffdavid/nimbus,andaluz/nimbus,SuPair/nimbus,zilaiyedaren/nimbus,SuPair/nimbus,hanangellove/nimbus,zaichang/nimbus,kviksilver/nimbus,WeeTom/nimbus,mohsinalimat/nimbus,marcobgoogle/nimbus,kisekied/nimbus,zilaiyedaren/nimbus,quyixia/nimbus,mohsinalimat/nimbus,tranhieutt/nimbus,0xced/nimbus,jverkoey/nimbus,treejames/nimbus,compositeprimes/nimbus,zaichang/nimbus,kviksilver/nimbus