feat(http): add basic http service

This implementation only works in JavaScript, while the Observable transpilation
story gets worked out. Right now, the service just makes a simple request,
and returns an Observable of Response.

Additional functionality will be captured in separate issues.

Fixes #2028

gulpfile.js

@@ -845,6 +845,16 @@ gulp.task('!build/change_detect.dart', function(done) {
   proc.stdout.pipe(dartStream);
 });
 
+// ------------
+// additional tasks for building examples
+gulp.task('build.http.example', function() {
+  //Copy over people.json used in http example
+  return gulp.src('modules/examples/src/http/people.json')
+      .pipe(gulp.dest(CONFIG.dest.js.prod.es5 + '/examples/src/http/'))
+      .pipe(gulp.dest(CONFIG.dest.js.dev.es5 + '/examples/src/http/'))
+      .pipe(gulp.dest(CONFIG.dest.js.dart2js + '/examples/src/http/'));
+});
+
 // ------------
 // angular material testing rules
 gulp.task('build.css.material', function() {