fixed ignoring '*' then negating didn't work

[hamstergene]

The .atomignore file like this doesn't work, because once project root has been hidden, _fUnhideParents would not unhide it.

The ignore rules must not apply to project root. This is how Atom's core package tree-view works with .gitignore, and so should this one.

[leny]

Hi! Thanks for this!

I'm quite busy this week, will try to merge and publish as soon as I can.