Move root user check forward

Root user check is now moved from the installation function to main. The new
location is after parsing the label but before printing the log for blocking
process and notify settings.  This prevents a downloading an application
that can't be installed.
Resolves issue #88

fragments/main.sh

@@ -5,6 +5,10 @@
     ;;
 esac
 
+# MARK: check for root
+    if [ "$(whoami)" != "root" ]; then
+        # not running as root
+        cleanupAndExit 6 "not running as root, exiting"
 
 # MARK: application download and installation starts here