Fonts: added Roboto Mono (issue #638)

flatlaf-fonts/flatlaf-fonts-roboto-mono/README.md

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+Roboto Mono font
+================
+
+This sub-project contains fonts from the Roboto Mono font family and bundles
+them into an easy-to-use and redistributable JAR.
+
+Font home page: https://fonts.google.com/specimen/Roboto+Mono
+
+GitHub project: https://github.com/googlefonts/RobotoMono
+
+License:
+[Apache License, Version 2.0](src/main/resources/com/formdev/flatlaf/fonts/roboto_mono/LICENSE.txt)
+
+
+How to install?
+---------------
+
+Invoke following once (e.g. in your `main()` method; on AWT thread).
+
+For lazy loading use:
+
+~~~java
+FlatRobotoMonoFont.installLazy();
+~~~
+
+Or load immediately with:
+
+~~~java
+FlatRobotoMonoFont.install();
+~~~
+
+
+How to use?
+-----------
+
+Use as application monospaced font (invoke before setting up FlatLaf):
+
+~~~java
+FlatLaf.setPreferredMonospacedFontFamily( FlatRobotoMonoFont.FAMILY );
+~~~
+
+Create single fonts:
+
+~~~java
+// basic styles
+new Font( FlatRobotoMonoFont.FAMILY, Font.PLAIN, 12 );
+new Font( FlatRobotoMonoFont.FAMILY, Font.ITALIC, 12 );
+new Font( FlatRobotoMonoFont.FAMILY, Font.BOLD, 12 );
+new Font( FlatRobotoMonoFont.FAMILY, Font.BOLD | Font.ITALIC, 12 );
+~~~
+
+If using lazy loading, invoke one of following before creating the font:
+
+~~~java
+FontUtils.loadFontFamily( FlatRobotoMonoFont.FAMILY );
+~~~
+
+E.g.:
+
+~~~java
+FontUtils.loadFontFamily( FlatRobotoMonoFont.FAMILY );
+Font font = new Font( FlatRobotoMonoFont.FAMILY, Font.PLAIN, 12 );
+~~~
+
+Or use following:
+
+~~~java
+Font font = FontUtils.getCompositeFont( FlatRobotoMonoFont.FAMILY, Font.PLAIN, 12 );
+~~~
+
+
+Download
+--------
+
+FlatLaf Fonts binaries are available on **Maven Central**.
+
+If you use Maven or Gradle, add a dependency with following coordinates to your
+build script:
+
+    groupId:     com.formdev
+    artifactId:  flatlaf-fonts-roboto-mono
+    version:     (see button below)
+
+Otherwise download `flatlaf-fonts-roboto-mono-<version>.jar` here:
+
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-roboto-mono/badge.svg?style=flat-square&color=007ec6)](https://maven-badges.herokuapp.com/maven-central/com.formdev/flatlaf-fonts-roboto-mono)