Version 4.6 of xMarkup

This version was preparing yet year ago, but due to pandemia my vital forces was exhausted.
Console modules were built with Unicon v13.2 x86_64 (GCC v9.2), December 2020 sources.
GUI was updated and built with Lazarus IDE v2.2.0.4.
Supported architecture now is only x86_64.
It was supposed to include in this release the updated GUI of WordTabulator, but still postponed.
There were added examples of xm scripts to demonstrate graphics features of Icon/Unicon.
Thanks to Carl Sturtivant (sturtivant@gmail.com) there was added integration with console text editor micro https://github.com/zyedidia/micro