Auto login profile selection

This is an alternative approach for PR #2678. I think we were all still not too happy about the usability of the chosen implementation in that PR. Unfortunately work kept me too busy the last couple of months to give it the proper attention.

What I have tried to do is mimic the normal settings windows. The buttons on the left are now used to swap between the two windows on the right. They no longer perform a settings change.
The window is now called "Profiles - Settings" versus "Settings - Profiles". It also has the help section in the bottom, just like a normal settings window.

![screenshot000](https://f.cloud.github.com/assets/671891/1824518/e04ae2c0-7199-11e3-9539-4237d9e295c8.png)

The popup dialog to select the auto login profile is now equal to the one used to select e.g. the language, region, character set, and timezone country in Appearance - Settings - International. I have removed the icons, locked status and cancel button. Basically the items that made it kind of clunky.

![screenshot001](https://f.cloud.github.com/assets/671891/1824520/e06d2e34-7199-11e3-929b-dce43ad43124.png)

The Profiles window has basically stayed the same. Personally, I would remove the large icon, Selected Profile and Last Logged In on the left of the window because I consider that still to be clunky but I guess that's a matter of taste. 

![screenshot002](https://f.cloud.github.com/assets/671891/1824519/e06c6c38-7199-11e3-8703-d213b196bf6e.png)

I think this is a much better solution than PR #2678. It blends in really well with the rest of XBMC in my opinion.