Merge pull request #16 from Simonwep/build-system

TravisCI config has been removed, as well as Gradle wrapper scripts.

Moving on to next set of PRs. Thanks!

.github/workflows/pull-request.yml

@@ -0,0 +1,14 @@
+name: Run Gradle on PRs
+on: pull_request
+jobs:
+  gradle:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 8
+      - uses: eskatos/gradle-command-action@v1
+        with:
+          gradle-version: 6.6.1
+          arguments: build

.gitignore

@@ -1,31 +1,12 @@
-# Created by .ignore support plugin (hsz.mobi)
-### Java template
-# Compiled class file
 *.class
-
-# Log file
 *.log
 
-# BlueJ files
-*.ctxt
-
-# Mobile Tools for Java (J2ME)
-.mtj.tmp/
-
-# Package Files #
-*.jar
-*.war
-*.ear
-*.zip
-*.tar.gz
-*.rar
-
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
-
 *.idea
 *.iml
-/_psd
-/.gradle
-/target
-_tmp
+
+build/
+.gradle/
+
+gradle/
+gradlew*