Circumvent an error in test_dot for Numpy 1.12.0.

Numpy 1.12.0 updated iscomplexobj which always shows False for
tinyarrays, which makes assert_almost_equal fail for complex
array-valued arguments, as they will not be split up into real and
imaginary part. We circumvent this bug by testing every entry
separately in this case. This bug will be fixed for Numpy 1.12.1.

Fixes #11
4 jobs for master in 3 minutes and 32 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed mirror #8957

00:00:27

passed python2 #8955

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passed python3 #8956

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  Deploy
passed create conda dev package #8958

00:03:04