add putText and putTextLn

[gregwebs]

I would like to change putStr to accept either String or Text. However, for putStr that would require either an explicit type signature or extended default rules, so using a different name putText seems better.

But CorePrelude already exports putStrLn that only takes Text, so maybe it is better to follow that convention?

[gregwebs]

Actually I am thinking it is better to add putStr to CorePrelude

[gregwebs]

This is unnecessary now that basic-prelude has been changed