Uploaded script used for a new release

I more or less copied it from my other repository: https://github.com/TKJElectronics/Balanduino/blob/master/download.sh

release.sh

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+#!/bin/sh -e
+# Script to automatically download the project including all submodules
+# It then zips the hardware add-on and calculate the SHA-256 and file size
+# This is used with the Arduino Boards Manager
+
+url=https://github.com/Lauszus/Sanguino.git
+hardware_add_on_path=avr
+
+dir="$(cd "$(dirname "$0")" && pwd)"
+echo "Working path: $dir"
+
+name=$(echo $(echo $url | rev | cut -d'/' -f 1 | rev) | cut -d'.' -f 1)
+echo "\nClone Project: $name\n"
+git clone --depth 1 --single-branch -b master --recursive $url || exit 1
+cd "$name"
+
+echo "\nRemove git files"
+find . -name .git | xargs rm -rf
+find . -name .gitmodules | xargs rm -rf
+find . -name .gitignore | xargs rm -rf
+find . -name .gitattributes | xargs rm -rf
+
+cd "$dir"
+mv "$name/$hardware_add_on_path" "$dir/$name-hardware" # Rename avr directory and move out of folder
+
+echo "Remove \"$name\" directory"
+rm -rf $name
+
+mv "$dir/$name-hardware" "$dir/$name" # Rename hardware directory to the original name
+
+echo "ZIP hardware directory"
+zip -rq "$name" "$name" # Zip the hardware add-on
+
+echo "Remove hardware directory"
+rm -rf "$name"
+
+# Calculate SHA-256 and file size of hardware add-on used for "package_lauszus_sanguino_index.json"
+echo \"checksum\": \"SHA-256:`shasum -a 256 $name.zip | awk '{print $1}'`\",
+echo \"size\": \"`ls -l $name.zip | awk '{print $5}'`\",