new command: `vc resolved`
new %info method: %mod_files

- returns a list of modified *and untracked* files
to support his, had to expand the possible types of info methods to include ArrayRef
also had to hoist the dereferncing code to its own support method ($self->deref)
need a bit more context for this die
was doing env var substitutions a littie too soon

really only need to do them in conditions
if there are env vars referenced in commands, let the shell handle them
this keep from trying to do env var expansion too aggressively
-	example: git status -s | awk '{print $2}'
-	don't want to treat $2 like an env var
-	and the shell already handles this properly, so let it handle it
now printing pretend messages for commands run during %info capture too

originally I wasn't going to do this
and then I was going to do it, but only if you specified -v
and then I was going to do it, but only if you were running `vc info`
but I just decided to do it always (at least for now; we can revisit this later if it gets too cluttered)