Merge pull request #2 from prebid/update-readme

Correct readme wording

README.md

@@ -1,5 +1,5 @@
-# Adserver Cateogry Translatin File
+# Ad server Category Translation File
 
-This file is the default adserver category translation file to be used Prebid.js while doing adpod header bidding. It converts IAB sub category to adserver category.
+This repository will manage the default category translation file for each Ad server supported by Prebid.js while doing long form header bidding. It converts IAB sub category to Ad server category.
 
-This json is accessible from jsdelivr as  https://cdn.jsdelivr.net/gh/prebid/category-mapping-file@1/mappings.json
+This json is accessible from jsdelivr as  https://cdn.jsdelivr.net/gh/prebid/category-mapping-file@1/freewheel-mapping.json