Don't apply extension automatically, makes it impossible to keep

existing extension without issue (see
gruntjs#79) if the user
wishes to add an extension they can do so via ext or rename.

tasks/lib/compress.js

@@ -44,15 +44,6 @@ module.exports = function(grunt) {
           return nextFile();
         }
 
-        // Append ext if the specified one isnt there
-        if (typeof filePair.orig.ext === 'undefined') {
-          var ext = '.' + extension;
-          // if the chosen ext is different then the dest ext lets use it
-          if (String(filePair.dest).slice(-ext.length) !== ext) {
-            filePair.dest += ext;
-          }
-        }
-
         // Ensure the dest folder exists
         grunt.file.mkdir(path.dirname(filePair.dest));