Added CI environment and changed to GRADLE as build tool

.gitignore

@@ -45,3 +45,97 @@ target/
 tmp/
 img/
 
+### Gradle template
+.gradle
+/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+### Java template
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/dictionaries
+.idea/**/shelf
+.idea/sonarlint/**
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# CMake
+cmake-build-debug/
+cmake-build-release/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+

.travis.yml

@@ -0,0 +1,18 @@
+language: java
+jdk:
+- oraclejdk8
+- oraclejdk9
+- openjdk8
+
+cache:
+  directories:
+  - "${HOME}/.gradle"
+
+addons:
+  sonarcloud:
+    organization: "expeditioneer-github"
+    token:
+      secure: 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
+
+script:
+  - "./gradlew dependencyUpdates clean test shadow sonarqube"