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 processing/processing#3054 and processing/processing#3055.

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

.travis.yml

@@ -9,8 +9,16 @@ jdk:
 before_install:
   - sudo apt-get -qq update
   - sudo apt-get install ant-optional
+  - sudo apt-get install wget
+  - wget --no-check-certificate https://www-us.apache.org/dist//ant/binaries/apache-ant-1.10.7-bin.tar.gz
+  - tar -xzvf apache-ant-1.10.7-bin.tar.gz
+  - export PATH=`pwd`/apache-ant-1.10.7/bin:$PATH
+
+services:
+  - xvfb
 
 before_script:
+  - export DISPLAY=:99.0
   - cd build
 
 script:

app/src/processing/app/Platform.java

@@ -75,6 +75,10 @@ public class Platform {
 
   // . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 
+  static public boolean isInit() {
+    return inst != null;
+  }
+
 
   static public void init() {
     try {

app/src/processing/app/tools/InstallCommander.java

@@ -161,4 +161,4 @@ public boolean accept(File dir, String name) {
       list.append(jar.getAbsolutePath());
     }
   }
-}
+}

app/src/processing/app/ui/Editor.java

@@ -2898,7 +2898,6 @@ public void statusError(String what) {
    * Show an exception in the editor status bar.
    */
   public void statusError(Exception e) {
-    e.printStackTrace();
 //    if (e == null) {
 //      System.err.println("Editor.statusError() was passed a null exception.");
 //      return;
@@ -2909,9 +2908,7 @@ public void statusError(Exception e) {
 
       // Make sure something is printed into the console
       // Status bar is volatile
-      if (!re.isStackTraceEnabled()) {
-        System.err.println(re.getMessage());
-      }
+      System.err.println(re.getMessage());
 
       // Move the cursor to the line before updating the status bar, otherwise
       // status message might get hidden by a potential message caused by moving
@@ -2940,6 +2937,8 @@ public void statusError(Exception e) {
                           textarea.getLineStopOffset(line) - 1);
         }
       }
+    } else {
+      e.printStackTrace();
     }
 
     // Since this will catch all Exception types, spend some time figuring