FEAT: MOLD file! will be escaped now.

FIX: issue #632 (FORM file! not escaped)
Merge pull request #743 from qtxie/mold-file

FEAT: MOLD file! will be escaped now.
FEAT: granted wish #734 (lit-word variables decay to word when evaluated)

Now lit-words will not decay to words when accessed indirectly.
Merge branch 'master' of github.com:red/red