tests and fixes for ⍴
renamed .unbox() to .unwrap()

"Unbox" has different connotations in the context of APL.
added ÷ to keyboard

http://stackoverflow.com/questions/5613229/which-is-the-best-and-free-apl-interpreter/6343648?noredirect=1#comment23124181_6343648
implemented . (inner product adverb)

used other adverbs as building blocks, lovely