Merge branch 'dev' of https://github.com/KevinMusgrave/pytorch-metric-learning into dev

Author: KevinMusgrave

CONTENTS.md

@@ -46,6 +46,7 @@
 | [**ProxyNCALoss**](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#proxyncaloss) | [No Fuss Distance Metric Learning using Proxies](https://arxiv.org/pdf/1703.07464.pdf)
 | [**RankedListLoss**](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#rankedlistloss) | [Ranked List Loss for Deep Metric Learning](https://arxiv.org/abs/1903.03238)
 | [**SignalToNoiseRatioContrastiveLoss**](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#signaltonoiseratiocontrastiveloss) | [Signal-to-Noise Ratio: A Robust Distance Metric for Deep Metric Learning](http://openaccess.thecvf.com/content_CVPR_2019/papers/Yuan_Signal-To-Noise_Ratio_A_Robust_Distance_Metric_for_Deep_Metric_Learning_CVPR_2019_paper.pdf)
+| [**SmoothAPLoss**](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#smoothaploss) | [Smooth-AP: Smoothing the Path Towards Large-Scale Image Retrieval](https://arxiv.org/abs/2007.12163)
 | [**SoftTripleLoss**](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#softtripleloss) | [SoftTriple Loss: Deep Metric Learning Without Triplet Sampling](http://openaccess.thecvf.com/content_ICCV_2019/papers/Qian_SoftTriple_Loss_Deep_Metric_Learning_Without_Triplet_Sampling_ICCV_2019_paper.pdf)
 | [**SphereFaceLoss**](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#spherefaceloss) | [SphereFace: Deep Hypersphere Embedding for Face Recognition](https://arxiv.org/pdf/1704.08063.pdf)
 | [**SubCenterArcFaceLoss**](https://kevinmusgrave.github.io/pytorch-metric-learning/losses/#subcenterarcfaceloss) | [Sub-center ArcFace: Boosting Face Recognition by Large-scale Noisy Web Faces](https://www.ecva.net/papers/eccv_2020/papers_ECCV/papers/123560715.pdf)