Add torch-1.7.1 to previous versions

Author: malfet

_get_started/previous-versions.md

@@ -17,6 +17,63 @@ your convenience.
 
 ## Commands for Versions >= 1.0.0
 
+### v1.7.1
+
+#### Conda
+
+##### OSX
+
+```
+# conda
+conda install pytorch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2 -c pytorch
+```
+
+#####  Linux and Windows
+
+```
+# CUDA 9.2
+conda install pytorch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2 cudatoolkit=9.2 -c pytorch
+
+# CUDA 10.1
+conda install pytorch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2 cudatoolkit=10.1 -c pytorch
+
+# CUDA 10.2
+conda install pytorch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2 cudatoolkit=10.2 -c pytorch
+
+# CUDA 11.0
+conda install pytorch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2 cudatoolkit=11.0 -c pytorch
+
+# CPU Only
+conda install pytorch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2 cpuonly -c pytorch
+```
+
+#### Wheel
+
+##### OSX
+
+```
+pip install torch==1.7.1 torchvision==0.8.2 torchaudio=0.7.2
+```
+
+##### Linux and Windows
+
+```
+# CUDA 11.0
+pip install torch==1.7.1+cu110 torchvision==0.8.2+cu110 torchaudio==0.7.2 -f https://download.pytorch.org/whl/torch_stable.html
+
+# CUDA 10.2
+pip install torch==1.7.1 torchvision==0.8.2 torchaudio==0.7.2
+
+# CUDA 10.1
+pip install torch==1.7.1+cu101 torchvision==0.8.2+cu101 torchaudio==0.7.2 -f https://download.pytorch.org/whl/torch_stable.html
+
+# CUDA 9.2
+pip install torch==1.7.1+cu92 torchvision==0.8.2+cu92 torchaudio==0.7.2 -f https://download.pytorch.org/whl/torch_stable.html
+
+# CPU only
+pip install torch==1.7.1+cpu torchvision==0.8.2+cpu torchaudio==0.7.2 -f https://download.pytorch.org/whl/torch_stable.html
+```
+
 ### v1.7.0
 
 #### Conda