Compare the key missing or unnecessary keys in Json file.
This script has been created to check the differences between two translation files (ng-translate).
The aim is to compare the first parameter file with the following ones and get the missing and unnecessary keys.
Check the following files' (file2 ...) missing keys according to the file1's keys
node languageChecker.js <file1> <file2> [<file3>...]
var DEBUG = true;
Be carefull, the key in array are not check. Just the length of them.