cpp code highlighting issue (#27)

[ksakash]

{% highlight c++ %} .... {% endhighlight %} not working, for all the .md files in the docs, so replaced it with ```cpp....```

[Dovyski]

Thank you for your contribution and help!

Could you please tell me a bit more about how they are not working? I've just checked cvui's online docs, e.g. button page, and {% highlight c++ %} .... {% endhighlight %} is working.

Did you encounter the problem while trying to render the docs locally using jekyll?

[ksakash]

Not locally, but when i was reading the on github repo.

[Dovyski]

Oh, I see. Your solution is much better (I didn't like the {% highlight%} thing). I will just check the changes locally before accepting the pull request.

[Dovyski]

All changes have been merged. Thank you very much for your time and contribution!