[enh] sample engine configuration file added

engines.cfg_sample

@@ -0,0 +1,49 @@
+[wikipedia]
+engine = mediawiki
+url    = https://en.wikipedia.org/
+number_of_results = 1
+
+[deviantart]
+engine = deviantart
+categories = images
+
+[ddg definitions]
+engine = duckduckgo_definitions
+
+[duckduckgo]
+engine = duckduckgo
+
+[flickr]
+engine = flickr
+categories = images
+
+[github]
+engine = github
+categories = it
+
+[google images]
+engine = google_images
+categories = images
+
+[piratebay]
+engine = piratebay
+categories = videos, music
+
+[soundcloud]
+engine = soundcloud
+categories = music
+
+[stackoverflow]
+engine = stackoverflow
+categories = it
+
+[startpage]
+engine = startpage
+
+[twitter]
+engine = twitter
+categories = social media
+
+[youtube]
+engine = youtube
+categories = videos