Moved most of the message handling to other classes.

I'm finding that this code is being used multiple times, so inheritance seems to be warranted.

browserCommands/build.gradle

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2021 William Hubbard. All Rights Reserved.
+ */
+
+plugins {
+    id 'java-library'
+}
+
+// In this section you declare where to find the dependencies of your project
+repositories {
+    mavenCentral()
+}
+
+// In this section you declare the dependencies for your production and test code
+dependencies {
+    // The production code uses the SLF4J logging API at compile time
+    implementation 'org.slf4j:slf4j-api:1.7.30'
+    implementation 'org.apache.logging.log4j:log4j-api:2.13.3'
+    implementation 'org.apache.logging.log4j:log4j-core:2.13.3'
+    implementation 'org.apache.logging.log4j:log4j-slf4j-impl:2.13.3'
+
+    // Declare the dependency for your favourite test framework you want to use in your tests.
+    // TestNG is also supported by the Gradle Test task. Just change the
+    // testCompile dependency to testCompile 'org.testng:testng:6.8.1' and add
+    // 'test.useTestNG()' to your build script.
+    testImplementation 'junit:junit:4.12'
+}
+
+sourceCompatibility = JavaVersion.VERSION_16
+targetCompatibility = JavaVersion.VERSION_16