Added options to change the tick interval + added hours, seconds etc as a div that can hidden or shown

[salmankhann]

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[svnm]

Hey @salmankhann thanks for your work on this. Unfortunately I would need to change a few things in this pr, so it might be best to discuss your ideas for enhancing it, and plan a few of the enhancements.

• We would prefer to have the component be less reliant on dom nodes so it works well with rendering to string serversider. So using dangerouslySetInnerHTML would not be a good idea.

• I think the tick interval needs to be 1000 for this to work correctly as a count down? We might need to do some more research on the math, it has been awhile since I set this up.

Thanks, Steven