Startup output fixes

[beatfactor]

We've updated this onboarding tool: 1.0.0 -> 1.5.1. To get the latest experience, run: npm init nightwatch@latest

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Nightwatch Configuration Wizard
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Setting up Nightwatch in ...

• the message to "get the latest experience" seems to always be displayed
• could we get the Nightwatch version number to show it like: "Setting up Nightwatch v2.6.9"

[garg3133]

I've fixed the first part.

Do we need the second part? Because the nightwatch package is not installed till this point, we can't directly get the version number.