Add ability to not encode a DataField value

[beastbytes]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌

To allow - for example - the DataField value to contain HTML

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.87%. Comparing base (21ee22f) to head (f5b1f1c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #258      +/-   ##
============================================
+ Coverage     82.85%   82.87%   +0.02%     
- Complexity      623      624       +1     
============================================
  Files            51       51              
  Lines          2105     2108       +3     
============================================
+ Hits           1744     1747       +3     
  Misses          361      361              

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