Pino is new okular mantainer!

I just changed okular code to reflect the reality.

That means i changed main.cpp to say Pino is okular mantainer, i was listed as mantainer, but Pino has been doing much more work than me and everyone was asking him, not me, about new features and things, so i thought it was about time to give him the credit he deserved if he agreed to take the position, and he did.

Obviously this does not mean i'll stop contributing to okular, i'll be as active as i've been in the past few months, that is not much, but is as much as i can.

Now we only need Pino to get a blog so he explains us how happy he is :-)