Revert "[test] convert manual test case "tray" to automatic"

This reverts commit 522aec266ddbf8b3f9bfdc26d5a648db5a89bd73.
Grant file: scheme to the renderer processes

Fix #871
Add App.getProxyForURL() to query proxy for URL

Fix #130
add test case for load remote img(need to put index.html under imgshown to server doc root)
[test] automatic test case for single-instance
link to https://github.com/rogerwang/node-webkit/wiki/Using-Node-modules in README

The wiki page has been renamed (#823), and the former link is no longer valid.
Merge pull request #879 from Mithgol/patch-1

link to https://github.com/rogerwang/node-webkit/wiki/Using-Node-modules in README.md
Updates quick start instructions.

I was tired of googling the right syntax of the zip command, so I added it to the quick start instructions.
add HTML5 doctype
Merge pull request #882 from Roland1975/master

Add HTML5 doctype
Merge pull request #881 from haihappen/patch-1

Updates quick start instructions.
Merge pull request #877 from richardcypher/tests

add test case for loading remote img
Merge pull request #878 from kingFighter/single-instance

[test] automatic test case for single-instance