Rewrite of card scripts completely

Reduce the card specific code to what's needed.

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

scripts/include/common-helpers.inc

@@ -0,0 +1,54 @@
+#! /bin/bash
+
+# common-helpers.inc
+# (c) Copyright 2018 Andreas Müller <schnitzeltony@gmail.com>
+# Licensed under terms of GPLv2
+#
+# This script contains some helper functions and can be sourced by other 
+# scripts
+
+# set terminal styles
+# are we on terrminal?
+if [ -t 1 ] ; then
+    # tput available?
+    if [ ! "x`which tput 2>/dev/null`" = "x" ] ; then
+        # supports colors ?
+        ncolors=`tput colors`
+        if [ -n "$ncolors" -a  $ncolors -ge 8 ] ; then
+            style_bold="`tput bold`"
+            style_underline="`tput smul`"
+            style_standout="`tput smso`"
+            style_normal="`tput sgr0`"
+            style_black="`tput setaf 0`"
+            style_red="`tput setaf 1`"
+            style_green="`tput setaf 2`"
+            style_yellow="`tput setaf 3`"
+            style_blue="`tput setaf 4`"
+            style_magenta="`tput setaf 5`"
+            style_cyan="`tput setaf 6`"
+            style_white="`tput setaf 7`"
+        fi
+    fi
+fi
+
+# base tempdir
+base_tempdir=`mktemp -u`
+base_tempdir=`dirname "$base_tempdir"`
+
+# ErrorOut outputs error text in first param and exits script
+ErrorOut() {
+    clear
+    echo "${style_red}${style_bold}${1}${style_normal}"
+    echo
+    exit -1
+}
+
+# CheckPrerequisite checks if required hosttool is found on host. In case not
+# it outputs a message and exits script.
+CheckPrerequisite() {
+    if [ "x`which $1 2>/dev/null`" = "x" ] ; then
+        ErrorOut "You need to install $1 first!"
+    fi
+}
+
+