Port to CodeIgniter 3.X

[hari-govind]

Hi bro, As a follow up to #4 , I've made necessary changes that make Treasure-Hunt compatible with the latest stable version of CodeIgniter(3.1.10). I've casually tested various features to make sure nothing is broken, but we will be doing a more through test before using Treasure-Hunt for our event and will fix any bugs that we encounter and make pull requests necessary. I'll update the readme within next weekend. Kindly review it and suggest changes if necessary. Regards

[xaneem]

Thank you so much @hari-govind. This looks good; let's merge it after your event is complete so that it doesn't break for anyone.

Also, do share the link when your treasure hunt event is live :)

[utkarshdubey]

Even I want to play your cryptic hunt. Post the link here. :)

[hari-govind]

You're welcome @xaneem :) And that's a good idea to merge after the event so that all commits related to the upgrade can be merged at once. @utkarshdubey2 thank you very much for your interest, I'll post the link once we have got this hosted so that you both can also play! :)