Bugs fixed

[gadilashashank]

Combined two scripts into one single script with appropriate GUI prompts and minor bug fixes. Also author credits have been added at appropriate places in the combined script.

[gadilashashank]

replace line 188 with
zenity --width=200 --height=160 --error --text="Enter C/D only or operation cancelled "
instead of
zenity --width=200 --height=160 --error --text="Enter C/D only "

[gadilashashank]

Added the word bash to run the script as root if user is not already root