.gitignore and test added

.classpath

.gitattributes

.gitignore

.project

.settings/org.eclipse.buildship.core.prefs

.vscode/launch.json

bin/main/io/fp/nextday/Date.class

bin/main/io/fp/nextday/DateException.class

bin/main/io/fp/nextday/Month.class

bin/main/io/fp/nextday/NextDay.class

build.gradle

gradle/wrapper/gradle-wrapper.jar

gradle/wrapper/gradle-wrapper.properties

gradlew

gradlew.bat

settings.gradle

src/main/java/io/fp/nextday/App.java

src/test/java/io/fp/nextday/DateTest.java