Fix install.sh when called from elsewhere

install.sh

@@ -14,7 +14,9 @@ if [ ! -e "$HOME/.git_user" ]; then
 fi
 
 # Init or update submodules
+cd "$SCRIPTPATH"
 git submodule update --init --recursive
+cd -
 
 # Setup fast-syntax-highlighting theme customization
 cp "$SCRIPTPATH/fsh_theme.zsh" "$SCRIPTPATH/current_theme.zsh"