#116 - double click handler, documentation update

[AJIXuMuK]

…dated

Q	A
Bug fix?	[ ]
New feature?	[x]
New sample?	[ ]
Related issues?	#116

What's in this Pull Request?

onDoubleClick has been added to props interface for FieldNameRenderer
The documentation for FieldNameRenderer has been updated to provide more clear descriptions of the properties.

[codecov-io]

Codecov Report

Merging #123 into dev will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #123   +/-   ##
=======================================
  Coverage   80.63%   80.63%           
=======================================
  Files          10       10           
  Lines         346      346           
  Branches       78       71    -7     
=======================================
  Hits          279      279           
  Misses         44       44           
  Partials       23       23

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[estruyf]

@AJIXuMuK as always, thank you for the PR! Very much appreciated.