[Marble] spelling junior job

[gkaukola at cs.ucr.edu]

Hi,

I figured I'd tackle the spelling errors junior job you have listed. 
Hopefully nobody else is working on that at the moment?

Anyhow, I already have this for you:

The file:
kdeedu/marble/docs/projects/gps/project_discription
should be named project_description.

Cheers,
Glen