Minor updates to Document/All.scl and Prelude.scl

Minor updates to Document/All.scl and Prelude.scl

"show" is able to type cast a ByteArray without the additional
specification in Prelude.scl. Show is unable to be used on ByteArrays if
Prelude.scl contains an implementation for it, as "show" cannot
determine which implementation to use: the general, or the ByteArray
specific. Thus, ByteArray has been removed from Prelude.

getTuples returns a list of tuples that can be of any format: they do
not necessarily have to all be the same. As a result, [a] specification
doesn't correctly reflect the data that can be fetched with getTuples,
but [Dynamic] does.

refs #7830
refs #7831

Change-Id: Ib9912e9479838df2c8d32c621936e8fdecef2d7b