added the ability to determine how many items are returned
moved die() and dieSyntax() to base class
converted test from JUnit to Scala Test
added a method for determining eligibility whether a previously execute command should be added to the session history
updated test text
updated test text
tasks that are launched in the background now display a message indicating so
rewrote the embedded function to be more idiomatic
updated the help texts
rewrote the previously issued command implementation
added the ability to limit the number of history items returned
clean up and updates
replaced Seq.empty with Nil