code: function stringify(string, params, noError) {
    var arr = string.split(':');
    var param;
    for(var i = 0, c = arr.length; i < c; i++) {
      param = arr[i];
      if(i % 2){
        if(!(typeof params[param] === 'string' || typeof params[param] === 'number')){
          if(!noError){
            throw new Error('Variable ' + param + ' not defined');
          }
        } else {
          arr[i] = params[param];
        }
      }
    }
    return arr.join('');
  }
docs: Function for replacing paramteres in a string with variables
  
  @param string  {String} string with placeholders
  @param params  {Object} object containing parameters
  @param noError {Boolean} wheter to break on missing or corrupt values
  @return {String}