allow options to invert regex and glob and combine them all

before, you could specify a regex or glob to match, but not both.
Now you can specify both, but also a regex NOT to match and a glob
NOT to match.

In order for reflex to react to the change ALL filters must say "OK"

so, for example, 
```
reflex -G '.*' -- echo {}
```

will not match any files whose names begin with '.' (eg vim swap files)