Coverage including some dependency files sometimes

[doughsay]

I'm running excoveralls in an umbrella. If I run mix coveralls -u at the top level, or if I cd into a specific application's directory and just run mix coveralls, it will include some random files from dependencies:

Finished in 9.2 seconds
271 doctests, 4 properties, 101 tests, 0 failures

Randomized with seed 987334
----------------
COV    FILE                                        LINES RELEVANT   MISSED
  0.0% /home/chris/src/noreaga/deps/mox/lib/mox      756        1        1
 51.9% lib/bson/id_server.ex                         101       27       13
  0.0% lib/mix/tasks/ci.module_filenames.ex          144       26       26
  0.0% lib/mix/tasks/ua_inspector.maybe_downloa       19        3        3
  0.0% lib/peek.ex                                    12        0        0
 71.9% lib/peek/actor.ex                             471       64       18
... continues

The first file should not be here; the rest are correct.

I get the same thing with mix coveralls -u at the top level, but with an incorrect file path:

... other coverage from other apps...
  0.0% apps/peek//home/chris/src/noreaga/deps/m      756        1        1
 51.9% apps/peek/lib/bson/id_server.ex               101       27       13
  0.0% apps/peek/lib/mix/tasks/ci.module_filena      144       26       26
  0.0% apps/peek/lib/mix/tasks/ua_inspector.may       19        3        3
  0.0% apps/peek/lib/peek.ex                          12        0        0
 71.9% apps/peek/lib/peek/actor.ex                   471       64       18
... continues

[doughsay]

I found what might be a related issue here: #109

But in my case I don't think this is solvable with the ignore feature, and also, I believe ignoring dependencies should be a natural behavior of excoveralls.