CAUTION admonitions, Kotlin code sample

[deining]

• Adding CAUTION admonitions about the use of static classes to ITypeConverter and IModelTransformer (Document static vs non-static nested classes (was: Kotlin: failure when declaring IParameterPreprocessor as inner class) #1297)
• Manual, chapter '4.2.2 Multi Parameter Type Converters': adding Kotlin version for code sample

[codecov]

Codecov Report

Merging #1307 (24391ba) into master (5819afa) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1307   +/-   ##
=========================================
  Coverage     93.78%   93.78%           
  Complexity      469      469           
=========================================
  Files             2        2           
  Lines          6951     6951           
  Branches       1864     1864           
=========================================
  Hits           6519     6519           
  Misses          146      146           
  Partials        286      286           

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[remkop]

Awesome! Thank you again!

Merged.
I will update release notes and publish HTML when I get to my PC (may take a while).

[remkop]

RELEASE NOTES updated and HTML rendered.
Thanks again!