[API] Use JSDoc config

gulpfile.js

@@ -151,7 +151,7 @@ gulp.task('api', function () {
     var markdown = require('gulp-markdown');
     return gulp.src('src/**/*.js')
         .pipe(concat('api.md'))
-        .pipe(jsdoc2md())
+        .pipe(jsdoc2md(require('./jsdoc.json')))
         .pipe(markdown())
         .pipe(gulp.dest(paths.dist));
 });

src/Selection.js

@@ -1,8 +1,9 @@
 define(['EventEmitter'], function (EventEmitter) {
     /**
-     * This is a selection.
+     * Maintains selection state for the application.
      * @interface
      * @memberof module:openmct
+     * @extends {EventEmitter}
      */
     function Selection() {
         EventEmitter.call(this);