Exclude tests from shipped npm package

pwfisher · pwfisher · commit 028a37cbedec · 2016-06-16T16:28:18.000-07:00
```
$ du -sh node_modules/fastboot*/test
5.7M	node_modules/fastboot-app-server/test
 17M	node_modules/fastboot-express-middleware/test
 27M	node_modules/fastboot/test
```
diff --git a/.npmignore b/.npmignore
@@ -0,0 +1,5 @@
+test
+.gitignore
+.jshintignore
+.jshintrc
+.travis.yml
