Allow passing custom Configuration instances to processors

[JimBobSquarePants]

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Description

This PR replaces #857 and fixes #650 by adding the ability to pass custom configuration to all processing operations.

[brianpopow]

looks good to me

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@d7eeb2f). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #1070   +/-   ##
=========================================
  Coverage          ?   89.83%           
=========================================
  Files             ?     1200           
  Lines             ?    53010           
  Branches          ?     3844           
=========================================
  Hits              ?    47621           
  Misses            ?     4561           
  Partials          ?      828

Impacted Files	Coverage Δ
...adata/Profiles/Exif/Tags/ExifTag.SignedRational.cs	100% <ø> (ø)
...eSharp/Metadata/Profiles/Exif/Values/ExifValues.cs	96.61% <100%> (ø)

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