Update README to include header body object

[peterpme]

thanks kye!

[codecov-io]

Codecov Report

Merging #27 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #27   +/-   ##
=======================================
  Coverage   81.81%   81.81%           
=======================================
  Files           1        1           
  Lines          33       33           
  Branches        7        7           
=======================================
  Hits           27       27           
  Misses          5        5           
  Partials        1        1

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