Ignore camelcase variable in JSHint

JSHint obeys directives at a function level, so you can find the enclosing function and add a camelcase option to it. Here’s an example:

/*jshint camelcase: true */

var not_camel_case = 1; // Warns

function example() {
  /*jshint camelcase: false */
  var not_camel_case = 2; // Does not warn
}