Merge pull request #345 from seejohnrun/fix-json-highlighting

Use the now-separate json mode for json highlighting

static/application.js

@@ -170,8 +170,7 @@ haste.extensionMap = {
   lua: 'lua', pas: 'delphi', java: 'java', cpp: 'cpp', cc: 'cpp', m: 'objectivec',
   vala: 'vala', sql: 'sql', sm: 'smalltalk', lisp: 'lisp', ini: 'ini',
   diff: 'diff', bash: 'bash', sh: 'bash', tex: 'tex', erl: 'erlang', hs: 'haskell',
-  md: 'markdown', txt: '', coffee: 'coffee', json: 'javascript',
-  swift: 'swift'
+  md: 'markdown', txt: '', coffee: 'coffee', swift: 'swift'
 };
 
 // Look up the extension preferred for a type