callback documentation

[jadonk]

From @troywweber7 on August 10, 2017 1:21

There is no documentation on the callbacks for any of the functions. From experimentation, I'm seeing that the format of callback responses is inconsistent and does not follow node.js standard callback structures. Can you provide some insight on the README about callbacks and their structure?

Copied from original issue: jadonk#152

[jadonk]

When you fix this, make sure the examples in bone101 still work.

[vaishnavachath]

Sure , i will verify the examples too while making changes , would it be okay to make changes to some of the bone101 examples to adapt to the change? ( if number of failing examples are quite low)