add IGulpPlugin and fix tests

gulp/gulp-tests.ts

@@ -2,28 +2,28 @@
 
 import gulp = require("gulp");
 
-var typescript: any = null; // this would be the TypeScript compiler
-var jasmine: any = null; // this would be the jasmine test runner
+var typescript: IGulpPlugin = null; // this would be the TypeScript compiler
+var jasmine: IGulpPlugin = null; // this would be the jasmine test runner
 
 gulp.task('compile', function()
 {
     gulp.src("**/*.ts")
-        .pipe(typescript)
-        .dest('out')
+        .pipe(typescript())
+        .pipe(gulp.dest('out'))
 });
 
 gulp.task('compile2', function(callback: (err?: any) => void)
 {
     gulp.src("**/*.ts")
-        .pipe(typescript)
-        .dest('out')
+        .pipe(typescript())
+        .pipe(gulp.dest('out'))
         .on('end', callback);
 });
 
 gulp.task('test', ['compile', 'compile2'], function()
 {
     gulp.src("out/test/**/*.js")
-        .pipe(jasmine);
+        .pipe(jasmine());
 });
 
 gulp.task('default', ['compile', 'test']);

gulp/gulp.d.ts

@@ -282,3 +282,7 @@ declare module "gulp" {
     var _tmp:gulp.Gulp;
     export = _tmp;
 }
+
+interface IGulpPlugin {
+    (...args: any[]): NodeJS.ReadWriteStream;
+}