Setup:

  $ source $TESTDIR/setup.sh
  $ mkdir -p ./a/bomb
  $ echo 'whatever' > ./a/bomb/foo.yml
  $ echo '*b/foo.yml' > ./.gitignore

Ignore foo.yml but not blah.yml:

  $ ag whatever .

Dont ignore anything (unrestricted search):

  $ ag -u whatever .
  a/bomb/foo.yml:1:whatever

Add failing test for ignore rules. We'll have to write our own fnmatch to fix this.
Add failing test for ignore rules. We'll have to write our own fnmatch to fix this.
