Add configuration option to hide application and games sections

[stevenhoving]

So the story goes like this: I want to give my kiddypow to a family member, but this particular family member is not really that into these kind of devices. So my goal is to add a option to hide the "Applications" and "Games" sections. This will simplify because it will then only show Settings and Emulators, which will make my life easier because I will be the one having to maintain the device. You know... family and computers...

I will be working on the code myself, so this issue is more of a "what do you guys think" issue.