Added support for 3 different footer areas. One each for each column.

[kdmurthy]

Hello,

Thanks for this wonderful theme. For my website, I actually purchases one from TF, but discarded and going ahead with this theme. Most of my modifications I could do through child theme.

I believe this functionality will be useful for others also - hence this pull request.

The change was simple. Each of the footer columns are provided in separate widget areas. Hope this will be useful for others.

[FreeWPTP]

@kdmurthy I hope you are well today and thanks for helping out here.

Your help here is really appreciated.

I checked your submitted commit which makes each of the footer columns in separate widget areas but this change should be optional that users can enable from theme options if they want to because if this change is compulsory then it will affect many sites that are using Travelify theme.

So could you please make this change optional so that we can merge your pull request?