Conditional text

[marcusx]

@mandnyc have you thought about adding a condition helper? So you could do something like:

const speech = new Speech();
speech.say('Hello')
      .pause('1s')
      .say('and thanks for your first visit. You can Do A B and C.', skillIsInvokedFirstTimeCondition)
      .say('What would you like to do?)

skillIsInvokedFirstTimeCondition would be a callback that returns true/false and would allow us to keep the decision when a text need to be added separate from the response building.

[itachiRedhair]

This is an useful feature. PR?