modify source_code to remove unnecessary files

ai/Megatron/English/Python/source_code/.create_dir_and_download_pytorch_sif_file.sh

@@ -0,0 +1,56 @@
+# Copyright (c) 2020 NVIDIA Corporation.  All rights reserved.
+#!/usr/bin/env bash
+cp create_dir_and_download_pytorch_sif_file.sh ../../../../../../
+cd ../../../../../../
+mkdir output
+mkdir output/sv_gpt3_ckpt/
+mkdir dataset
+
+# gdrive_download pre-built **pytorch_21.03.sif** which is needed to run singularity 
+# script to download Google Drive files from command line
+# not guaranteed to work indefinitely
+# taken from Stack Overflow answer:
+# http://stackoverflow.com/a/38937732/7002068
+
+gURL=https://drive.google.com/file/d/18-QSZhPhNJS3m9ASTPkjnzsFVgg71MNx/view?usp=sharing
+# match more than 26 word characters
+ggID=$(echo "$gURL" | egrep -o '(\w|-){26,}')
+
+ggURL='https://drive.google.com/uc?export=download'
+
+curl -sc /tmp/gcokie "${ggURL}&id=${ggID}" >/dev/null
+getcode="$(awk '/_warning_/ {print $NF}' /tmp/gcokie)"
+
+cmd='curl --insecure -C - -LOJb /tmp/gcokie "${ggURL}&confirm=${getcode}&id=${ggID}"'
+echo -e "Downloading from "$gURL"...\n"
+eval $cmd
+
+# gdrive_download toy dataset 
+
+gURL=https://drive.google.com/file/d/17hIXwG6jHgijmBJKq2Z211Hm6AXfQo9C/view?usp=sharing
+# match more than 26 word characters
+ggID=$(echo "$gURL" | egrep -o '(\w|-){26,}')
+
+ggURL='https://drive.google.com/uc?export=download'
+
+curl -sc /tmp/gcokie "${ggURL}&id=${ggID}" >/dev/null
+getcode="$(awk '/_warning_/ {print $NF}' /tmp/gcokie)"
+
+cmd='curl --insecure -C - -LOJb /tmp/gcokie "${ggURL}&confirm=${getcode}&id=${ggID}"'
+echo -e "Downloading from "$gURL"...\n"
+eval $cmd
+
+
+### move toy data to correct dirs
+mv toydata.zip ./dataset/
+cd dataset/
+unzip -r toydata.zip
+cd ..
+
+### move the Megatron run script to the correct directory
+cp ./gpubootcamp/ai/Megatron/English/Python/source_code/Day1-runMegatron-LM_GPT_template.sh ./
+
+### clone Megatron-LM repo onto the current dir
+git clone https://github.com/NVIDIA/Megatron-LM.git
+ls .
+echo "done !"