usage example
var screen = require('galileo-screen');
response = screen.wrapLines(response); //if your output is not wrapped, try A20NOVIEVCPH (availability screen)
if (previous_response) {
response = screen.mergeResponse(previous_response, response);
}
if (screen.hasMore(response)) {
//execute next MD somehow
} else {
callback(null, response);
}