Move to ANTLR 4 with Java 11 lang features and localization. (#5)

* Move to ANTLR 4 with Java 11 lang features and localization.

Introduces ANTLR4 and Java 8 language feature support within IDE while also adding additional hooks for localization of syntax error messages, addressing https://github.com/processing/processing/issues/3054 and https://github.com/processing/processing/issues/3055.

The PR is broadly a continuation of https://github.com/processing/processing/issues/3055, bringing it up to speed with the latest Processing master plus the changes introduced at https://github.com/processing/processing/pull/5753. **Requires https://github.com/processing/processing/pull/5753 as pre-requisite.** This introduces a number of edits beyond https://github.com/processing/processing/issues/3055 beyond compatibility with current Processing master and https://github.com/processing/processing/pull/5753 including:

 - Update to the grammar itself
 - Change ANTLR listeners to emit `TextTransform.Edit` to unify JDT-based `PreprocessingService` and `JavaBuild`, removing code with duplicate purpose.
 - Introduction of syntax error rewriting with support for localization.
 - Addition of complete localized strings set for English and Spanish.
 - Addition of partial localized strings set for other languages.
 - Refactor of ANTLR-related code for testability and readability
 - Expansion of tests including full parse tests for new Java features (type inference, lambdas).

* Ask travis for ant upgrade prior to run.

* Ask Travis for java11 update.

* Add openjdk ppa

* Travis no confirmation on add ppa.

* Force newer ant on travis.

* Swtich ant download to www-us mirror.

* Switch ant to 1.10.7

* Start x for unit tests in travis.

* More complete start x in travis.

* Revert x in travis.

* Try x in services.

java/test/processing/mode/java/pdex/util/ProblemFactoryTest.java

@@ -0,0 +1,52 @@
+package processing.mode.java.pdex.util;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mockito;
+import processing.app.Problem;
+import processing.app.ui.Editor;
+import processing.mode.java.preproc.issue.PdePreprocessIssue;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+public class ProblemFactoryTest {
+
+  private PdePreprocessIssue pdePreprocessIssue;
+  private List<Integer> tabStarts;
+  private Editor editor;
+
+  @Before
+  public void setUp() {
+    pdePreprocessIssue = new PdePreprocessIssue(8, 2, "test");
+
+    tabStarts = new ArrayList<>();
+    tabStarts.add(5);
+
+    editor = Mockito.mock(Editor.class);
+    Mockito.when(editor.getLineStartOffset(3)).thenReturn(10);
+    Mockito.when(editor.getLineStopOffset(3)).thenReturn(12);
+  }
+
+  @Test
+  public void buildWithEditor() {
+    Problem problem = ProblemFactory.build(pdePreprocessIssue, tabStarts, 15, editor);
+
+    Assert.assertEquals(3, problem.getLineNumber());
+    Assert.assertEquals("test", problem.getMessage());
+    Assert.assertEquals(10, problem.getStartOffset());
+    Assert.assertEquals(11, problem.getStopOffset());
+  }
+
+  @Test
+  public void buildWithoutEditor() {
+    Problem problem = ProblemFactory.build(pdePreprocessIssue, tabStarts);
+
+    Assert.assertEquals(3, problem.getLineNumber());
+    Assert.assertEquals("test", problem.getMessage());
+  }
+
+}

java/test/processing/mode/java/pdex/util/TabLineFactoryTest.java

@@ -0,0 +1,51 @@
+package processing.mode.java.pdex.util;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+public class TabLineFactoryTest {
+
+  private List<Integer> starts;
+
+  @Before
+  public void setUp() {
+    starts = new ArrayList<>();
+    starts.add(0);
+    starts.add(5);
+    starts.add(10);
+  }
+
+  @Test
+  public void getTabStart() {
+    Assert.assertEquals(0, TabLineFactory.getTab(starts, 0).getTab());
+  }
+
+  @Test
+  public void getTabMiddleFrontEdge() {
+    Assert.assertEquals(1, TabLineFactory.getTab(starts, 5).getTab());
+  }
+
+  @Test
+  public void getTabMiddle() {
+    TabLine tabLine = TabLineFactory.getTab(starts, 7);
+    Assert.assertEquals(1, tabLine.getTab());
+    Assert.assertEquals(2, tabLine.getLineInTab());
+  }
+
+  @Test
+  public void getTabMiddleBackEdge() {
+    Assert.assertEquals(2, TabLineFactory.getTab(starts, 10).getTab());
+  }
+
+  @Test
+  public void getTabEnd() {
+    Assert.assertEquals(2, TabLineFactory.getTab(starts, 15).getTab());
+  }
+
+}