Be able to use "multiple/path/parts" in ignored names

[ozra]

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: http://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: http://flight-manual.atom.io/hacking-atom/sections/debugging/
  • Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
  • Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

[Description of the issue]

I enter ".atom/packages" in "conf: ignored names", but it doesn't match like that. ".atom" is ok, "packages" is ok, etc.

Steps to Reproduce

1. Use a path-delimiter in ignore-name

Expected behavior: [What you expect to happen]

Expected it to match paths containing that text.

Actual behavior: [What actually happens]

Does not

Reproduces how often: [What percentage of the time does it reproduce?]

100%

Versions

Atom : 1.24.0
Electron: 1.6.16
Chrome : 56.0.2924.87
Node : 7.4.0
apm 1.18.12
npm 3.10.10
node 6.9.5 x64
atom 1.24.0
python 2.7.14
git 2.14.1