w07e01: Implementing +++ for JoinList
w07e02: Implementing indexJ

mistake in mconcat caused much headache
w07e03: Implementing dropJ
Breaking out jl1 test case
w07e04: Implementing takeJ
Adding trace for indexJ
Adding more tests
w07e05: Implementing Scrabble(tm)
w07e06: Implementing JoinListBuffEditor