Microsoft quietly announced earlier this week that it plans to shut down a long-standing tool supplying search engine startups and other software developers with a raw feed of Bing search results. The Bing Search APIs, or application programming interfaces, were once vital to many niche Google alternatives, but fell out of favor more recently as Microsoft hiked fees for the service and restricted its use.The shutoff, which is scheduled to begin on August 11, still came as a surprise to several d...