tutorial fixes from #336. Wheels with cuda10.1.

Summary:
Add a document to explain how to run the tutorials.
Fix API of TexturesVertex in fit_textured_mesh.
Prepare cuda 10.1 wheels (not 10.2) for linux to be available on pypi - this matches what colab has.
Change the tutorials to use these new wheels.

Reviewed By: gkioxari

Differential Revision: D23324479

fbshipit-source-id: 60e92a3f46a2d878f811b7703638f8d1dae143d9

.circleci/config.yml

@@ -55,7 +55,7 @@ binary_common: &binary_common
     wheel_docker_image:
       description: "Wheel only: what docker image to use"
       type: string
-      default: "pytorch/manylinux-cuda102"
+      default: "pytorch/manylinux-cuda101"
   environment:
     PYTHON_VERSION: << parameters.python_version >>
     BUILD_VERSION: << parameters.build_version >>
@@ -371,18 +371,18 @@ workflows:
           python_version: '3.8'
           pytorch_version: 1.6.0
       - binary_linux_wheel:
-          cu_version: cu102
-          name: linux_wheel_py36_cu102_pyt160
+          cu_version: cu101
+          name: linux_wheel_py36_cu101_pyt160
           python_version: '3.6'
           pytorch_version: 1.6.0
       - binary_linux_wheel:
-          cu_version: cu102
-          name: linux_wheel_py37_cu102_pyt160
+          cu_version: cu101
+          name: linux_wheel_py37_cu101_pyt160
           python_version: '3.7'
           pytorch_version: 1.6.0
       - binary_linux_wheel:
-          cu_version: cu102
-          name: linux_wheel_py38_cu102_pyt160
+          cu_version: cu101
+          name: linux_wheel_py38_cu101_pyt160
           python_version: '3.8'
           pytorch_version: 1.6.0
       - binary_linux_conda_cuda: