Add AppVeyor badge and make Travis badge only look at master [ci skip]

Author: p0deje

README.md

@@ -1,10 +1,7 @@
-Selenium [![Build Status](https://travis-ci.org/SeleniumHQ/selenium.svg)](//travis-ci.org/SeleniumHQ/selenium)
+Selenium [![Travis Status](https://travis-ci.org/SeleniumHQ/selenium.svg?branch=master)](//travis-ci.org/SeleniumHQ/selenium) [![AppVeyor Status](https://ci.appveyor.com/api/projects/status/pg1f99p1aetp9mk9/branch/master?svg=true)](https://ci.appveyor.com/project/SeleniumHQ/selenium/branch/master)
 ========
 [![SeleniumHQ](http://www.seleniumhq.org/images/big-logo.png)](http://www.seleniumhq.org/)
 
-
-
-
 Selenium is an umbrella project encapsulating a variety of tools and
 libraries enabling web browser automation. Selenium specifically
 provides infrastructure for the [W3C WebDriver specification](https://dvcs.w3.org/hg/webdriver/raw-file/tip/webdriver-spec.html)