More generic fixes for the decoding errors.

[Rafiot]

Use public dataset for test cases.

Replaces: https://github.com/erocarrera/pefile/pull/170

[codecov-io]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@aa44f2d). Click here to learn what that means. The diff coverage is 85.71%.

@@            Coverage Diff            @@
##             master     #189   +/-   ##
=========================================
  Coverage          ?   74.08%           
=========================================
  Files             ?        6           
  Lines             ?     2547           
  Branches          ?        0           
=========================================
  Hits              ?     1887           
  Misses            ?      660           
  Partials          ?        0

Impacted Files	Coverage Δ
ordlookup/__init__.py	85.71% <50%> (ø)
pefile.py	82.51% <87.67%> (ø)

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