settings.gradle: If at least Java 11 and Gradle 4.10 are detected, wallet-template is being built again.

This also means wallet-template is under continuous integration by Travis again.

README.md

@@ -8,8 +8,10 @@ The bitcoinj library is a Java implementation of the Bitcoin protocol, which all
 
 ### Technologies
 
-* Java 7 for the core modules, Java 8 for everything else
-* [Gradle 3.4+](https://gradle.org/) - for building the project
+* Java 7+ and Gradle 3.4+ for the `core` module
+* Java 8+ and Gradle 3.4+ for `tools` and `examples`
+* Java 11+ and Gradle 4.10+ for the JavaFX-based `wallettemplate`
+* [Gradle](https://gradle.org/) - for building the project
 * [Google Protocol Buffers](https://github.com/google/protobuf) - for use with serialization and hardware communications
 
 ### Getting started
@@ -18,17 +20,18 @@ To get started, it is best to have the latest JDK and Gradle installed. The HEAD
 
 #### Building from the command line
 
-To perform a full build use
+Official builds are currently using with JDK 8, even though the `core` module is compatible with JDK 7 and later.
+
+To perform a full build (*including* JavaDocs and unit/integration *tests*) use JDK 8+
 ```
 gradle clean build
 ```
-You can also run
-```
-gradle javadoc
-```
-to generate the JavaDocs.
+If you are running JDK 11 or later and Gradle 4.10 or later, the build will automatically include the JavaFX-based `wallettemplate` module. The outputs are under the `build` directory.
 
-The outputs are under the `build` directory.
+To perform a full build *without* unit/integration *tests* use:
+```
+gradle clean assemble
+```
 
 #### Building from an IDE