Restructure bootstrap dir, fix install.sh

With bootstrap files no longer linked to config directory, we can have
an easier directory structure with less nesting for them. Install.sh
needs to use the new structure when calling its bootstrap scripts.

install.sh

@@ -49,15 +49,16 @@ install() {
   fi
   echo "====================== BEGINNING INSTALLATION ============================="
   if ! "$unattended"; then
-    export BOOTSTRAP_PACKAGES="bootstrap/.config/bootstrap/packages.csv"
-    ./bootstrap/.config/bootstrap/install_packages.sh
+    export BOOTSTRAP_PACKAGES="bootstrap/packages.csv"
+    ./bootstrap/install_packages.sh
   else
-    export BOOTSTRAP_PACKAGES="bootstrap/.config/bootstrap/packages.csv"
-    ./bootstrap/.config/bootstrap/install_packages.sh -f
+    export BOOTSTRAP_PACKAGES="bootstrap/packages.csv"
+    ./bootstrap/install_packages.sh -f
   fi
+  unset BOOTSTRAP_PACKAGES
 
   echo "=================== BEGINNING DOTFILE MANAGEMENT =========================="
-  ./bootstrap/.config/bootstrap/autostow.sh -s
+  ./bootstrap/autostow.sh -s
 
   echo "====================== INSTALLATION FINISHED =============================="