Using exec.Cmd pipes for stdout and stderr which don't deadlock and a…

[agorman]

…re closed properly by call to wait

This would solve #68. I haven't fixed the failing tests yet and wanted to get your opinion.

Thanks!

[agorman]

@barasher any thoughts on this?

[codecov-commenter]

Codecov Report

Patch coverage: 50.00% and project coverage change: -1.35 ⚠️

Comparison is base (b9a9a53) 80.80% compared to head (97132af) 79.46%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #69      +/-   ##
==========================================
- Coverage   80.80%   79.46%   -1.35%     
==========================================
  Files           2        2              
  Lines         297      297              
==========================================
- Hits          240      236       -4     
- Misses         40       42       +2     
- Partials       17       19       +2     

Impacted Files	Coverage Δ
exiftool.go	70.95% <50.00%> (-1.91%)	⬇️

☔ View full report in Codecov by Sentry.
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[barasher]

I'm so sorry @agorman, I really did not have time to check it yet. I'm running out of time these last week's but it should be better in one or two weeks.
I do not forget this PR.

[agorman]

@barasher thanks for the update. I'm not in a big hurry on this so don't stress about it. When you have some extra time take a look.

Thanks!

[agorman]

@barasher bump :)