Update 'test' task to print message describing how to run tests and delete gulp task for running tests

Since we use VS Code's infrastructure for running tests (allowing us to access VS Code objects inside tests), the right way to run tests inside VS Code is to launch the debugger with the 'Launch Tests' configuration. At the command-line, the 'npm test' command runs tests. However, that downloads a build of VS Code to run the tests, which doesn't support being launched while other instances of VS Code or open.

Author: DustinCampbell

.vscode/tasks.json

@@ -11,7 +11,10 @@
 		},
 		{
 			"taskName": "test",
+			"command": "echo",
 			"showOutput": "always",
+			"isShellCommand": true,
+			"args": ["Run tests in VS Code by launching the debugg with the 'Launch Tests' configuration."],
 			"isTestCommand": true
 		},
 		{

gulpfile.js

@@ -145,18 +145,6 @@ gulp.task('package:offline', ['clean'], () => {
     return promise;
 });
 
-/// Test Task
-gulp.task('test', () => {
-    gulp.src('out/test/**/*.tests.js')
-        .pipe(mocha({ ui: "tdd" }))
-        .once('error', () => {
-            process.exit(1);
-        })
-        .once('end', () => {
-            process.exit();
-        });
-});
-
 /// Misc Tasks
 const allTypeScript = [
     'src/**/*.ts',