SQL errors are discarded

[ghost]

The current promise implementation discards the error object, which actually has information about the error, while the transaction object does not.

below my proposed change:

DB.prototype.executeSql = function(query, args) {
  var that = this;
  return new Promise(function(resolve, reject) {
    that.db.transaction(function(t) {
      t.executeSql(query, args,
        function(t, r) {
          resolve(r);
        },
      //  function(e) {
       function(tx,err)
          console.log(err);
          reject(err);
        });
    });
  });
};

Thanks!

[MetaMemoryT]

Sure that sounds reasonable, send a pull request and I'll merge it.