Autocomplete methods

Here is the code:

```julia
pat = r"^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$"
ismatch(pat, "ab01.cd.fda14k@hot-mail.to-future.nl")
m = match(pat, "ab01.cd.fda14k@hot-mail.to-future.nl")
m.match
m.offset
m.captures
```

Pressing ctrl+space after `m.` has no effect.  Would be nice to have autocompletion for this, thanks!