Improved transfer attributes 2.0.0 for Maya (maya script)

What`s new v2.0:
++ Support for maya version 2018-2020
++ Auto select right script version according to your maya version
++ Fixed bug when it was possible to add "ok" text to the items once you click copy button multiple times

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What`s new v1.1.1:
Fixed:
++ multiple window bug.
++ incorrect update of goal item vertex count.

Updated:
++ minor code improvements.
++ version numbers become x.x.x format as it`s on store.
++ interface typo

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What`s new v0.2:
++ check vertex count.

++ auto check if transfer possible.

++ new window generation style.

++ added information for user.

++ better error handling.