Updated validate script (sort of)

Added commented out valgrind command to test the deletion of a task.
It's commented out (that's the sort of part) because I don't like to
run the script and have to enter a y or n becuase I'm lazy. I could use
xargs or something to send the n to the command first, then call it
again with a y to truly test it. But right now I'm not concerned because
I've tested it and it's leak free -- if you don't believe me then you
can do it yourself.
Added usage for delete and updated readme

Updated help text for program to include information about the delete
command. Also added pause and delete to the list of commands shown when
running tcatch with no command.
Merge branch 'release/gamma' into develop