Added the option format to config files (config.yml + worldedit.properties). By default, current date and time are displayed.
The formatting function is implemented by analogy with the class java.util.logging.SimpleFormatter
Previously some exceptions were being handled only in the ParametricCallable, which lead to other dispatchers throwing the exception, and requesting that users report them.
Fixes WORLDEDIT-3386
This converts the project into a multi-module Gradle build.
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