Simplified SageMaker conda create command for pytorch v1 stable (#122)

* modified sagemaker docs to use CFN template with lifecycle config instead of manual steps

* modified alt tags

* added tab to img

* added tab to img

* added another number

* indended table correctly

* changed imgs path for sagemaker screenshots

* rolled back sagemaker docs

* added sagemaker create and start scripts

* updated update sagemaker docs page

* removed note about not saving models or data

* merged

* modified docs to create LC and IAM role with CFN

* updated cfn filename

* changed cfn stack name

* updated sagemaker scripts

* fixed bug in the sagemaker create script

* updated sagemaker scripts to install jupyter nbextensions

* start script now kills jupyter notebook server rather than server reboot

* changed order of start scripts

* updated to install stable pytorch

* added fix to setup fastai kernel correctly

docs/setup/sagemaker-create

@@ -10,7 +10,7 @@ mkdir /home/ec2-user/SageMaker/.fastai && ln -s /home/ec2-user/SageMaker/.fastai
 # install the fastai library and dependencies
 echo "Install the fastai library and dependencies in new conda enviornment"
 cd /home/ec2-user/SageMaker
-conda create -mqyp envs/fastai -c pytorch -c fastai python=3.6 jupyter pytorch-nightly fastai cuda92 torchvision-nightly
+conda create -mqyp envs/fastai -c pytorch -c fastai fastai ipykernel
 echo "Finished installing environment"
 
 # clone the course notebooks
@@ -27,7 +27,7 @@ if [ ! "$CONDA_DEFAULT_ENV" = "fastai" ]; then
     source activate envs/fastai
 fi
 echo "Updating fastai library"
-conda update -y -c fastai fastai
+conda install -y -c fastai fastai
 echo "Getting latest version of course"
 cd /home/ec2-user/SageMaker/course-v3
 git pull
@@ -43,7 +43,7 @@ cat > /home/ec2-user/SageMaker/.fastai/std-start-script.sh <<EOF
 echo "Install the ipython fastai kernel"
 cd /home/ec2-user/SageMaker
 source activate envs/fastai
-ipython kernel install --name 'fastai' --display-name 'Python 3' --user
+python -m ipykernel install --name 'fastai' --display-name 'Python 3' --user
 echo "Install jupyter nbextension"
 source /home/ec2-user/anaconda3/bin/activate JupyterSystemEnv
 pip install jupyter_contrib_nbextensions