Add bootstrap-Windows.cmd

usage: bootstrap-Windows.cmd [/?]

Bootstrap a macOS instance with:

* Windows SDK - from MSDN
* Chocolatey - package manager
* Cmder, including Git - from Chocolatey
* Python - from Chocolatey
* virtualenv - from pip
* SSH key - from ssh-keygen
* GitHub public key - with SSH key
* GitLab public key - with SSH key
* BitBucket Cloud public key - with SSH key
* Gogs Cloud public key - with SSH key
* conduit - configuration manager

optional arguments:
        /?              show this help message and exit

bootstrap-Debian.sh

@@ -59,7 +59,7 @@ agree() {
 }
 
 apt_install() {
-  sudo apt-get install --yes --install-recommends $1 > /dev/null
+  sudo apt install --yes --install-recommends $1 > /dev/null
 }
 
 pip_install() {
@@ -68,14 +68,15 @@ pip_install() {
 
 export PATH=~/.local/bin:$PATH
 
-agree "Update apt cache" && sudo apt-get update > /dev/null
-agree "Upgrade apt packages" "N" && sudo apt-get upgrade > /dev/null
+agree "Update apt cache" && sudo apt update > /dev/null
+agree "Upgrade apt packages" "N" && sudo apt upgrade > /dev/null
 
 missing git && agree "Install git" && apt_install git
 
 if missing pip; then
   agree "Install python-pip" && apt_install python-pip
-  agree "Upgrade pip with pip" && sudo -H pip install --upgrade pip > /dev/null
+  agree "Upgrade pip with pip" && \
+    sudo -H pip_install --upgrade pip > /dev/null
 fi
 
 missing virtualenv && agree "Install virtualenv" && pip_install virtualenv