Merge ConsoleUI project into JLine (fixes #841)

console-ui/LICENSE.txt

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console-ui/README.md

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+<img src="./doc/ConsoleUI-Logo.png" width="200"  align="right" alt="ConsoleUI logo">
+
+# ConsoleUI
+
+Tiny java library that provides simple UI elements on ANSI console based terminals. ConsoleUI is inspired by 
+[Inquirer.js](https://github.com/SBoudrias/Inquirer.js) which is written in JavaScript.
+
+ConsoleUI has been initially implemented using JLine2 by Andreas Wegmann. After ConsoleUI has been upgraded to use JLine3 
+it has been merged into JLine3.
+
+# Intention
+
+I was impressed by JavaScript based Yeoman which leads the user through the process of creating new projects
+by querying with a simple user interface on the console. An investigation how this is done, brought 
+me to Inquirer.js which implements a very simple and intuitive set of controls for checkbox, list and text input.
+
+Because I didn't find anything comparable to this in the Java ecosystem, I decided to write `Console UI`
+as a library with the same easy 'look and feel'. Some parts of the API are also comparable, but Console UI is not
+a Java clone of Inquirer.js.
+
+# Features
+
+ Console UI currently supports:
+
+ - Text input with completion and GNU ReadLine compatible editing
+ - Checkboxes
+ - Lists
+ - Expandable Choices (multiple key based answers for a question with help and optional list navigation)
+ - Yes/No-Questions
+
+A screen recording of the basic elements demo can be fund on YouTube [console UI demo](https://youtu.be/6dB3CyOX9rU).
+
+# Dependencies
+
+Console UI uses JLine for the dirty console things.
+
+# Maven artefact
+
+ConsoleUI releases are available at Maven Central [org.jline.console-ui » console-ui](https://search.maven.org/artifact/org.jline.console-ui/console-ui)
+
+# Test Run
+
+You can get an idea how the project works by looking at `org.jline.consoleui.examples.Basic`.  
+You can run this by executing the following from the project root:
+
+    ./jline-console-ui.sh
+
+# Usage
+
+*Hint: see the [how to](doc/howto.md) to get a more detailed documentation how to use ConsoleUI.*
+
+
+Entry point to the builder classes is to create a new object of type `ConsolePrompt`.
+
+    ConsolePrompt prompt = new ConsolePrompt();
+
+From the prompt object, use the `getPromptBuilder()` method to create the builder for all subsequent UI elements 
+you want to use.
+
+    PromptBuilder promptBuilder = prompt.getPromptBuilder();
+
+From with this `PromptBuilder` you can access UI builder with the following methods:
+
+- createCheckboxPrompt()
+    * creates a checkbox prompt. This prompt lets the user choose any number of items of a given list.
+- createChoicePrompt()
+    * creates a choice prompt. This prompt lets the user choose one from a given number of possible answers.     
+- createConfirmPromp()
+    * creates a confirmation prompt. This prompt lets the user answer with 'yes' or 'no' to a given question.
+- createInputPrompt()
+    * creates an input prompt. This prompt is a classic entry line like a shell. Because of the underlying readline
+      implementation it offers you to provide completers (like file name completer or string completer). In addition
+      to his, you can define a mask character which is printed on the screen instead of the typed keys like used
+      for hidden password entry.
+- createListPrompt()
+    * creates a list prompt. This prompt lets the user choose one item from a given list.
+
+
+
+