FEAT: added REMOVE action for any-series! and none! datatypes.
FIX: add missing return type declaration in SELECT specification.
Merge branch 'master' of github.com:dockimbel/Red
FEAT: added /all option support to CASE in the interpreter.
TESTS: fixed unset! tests.
FEAT: added missing mezz type testing functions: file? and issue?.
TESTS: fixed some tests for unset!.
FEAT: now /any is supported by SET/GET natives.
FIX: more accurate handling of unset! value, with error reporting. Fixes issue #431.
Merge pull request #433 from be-red/master

Curses for Red/System
TESTS: simplified way of generating unset! values (thanks to Kaj for the suggestion).
Merge branch 'master' of github.com:dockimbel/Red