[install] adds script to clone repo and run make

Pretty aggressive, no sanity checks. Unsure how I feel about it relying
on `git` but I guess it has to to handle the submodules?

install

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+DOTFILES_REPO=https://github.com/joshtronic/dotfiles
+DOTFILES_DIR=~/.dotfiles
+
+rm -rf $DOTFILES_DIR
+mkdir $DOTFILES_DIR
+git clone $DOTFILES_REPO $DOTFILES_DIR
+make -C $DOTFILES