Updated ubuntu.config.md for dummies
Updated ubuntu.config.md for dummies

This was already in good shape, but made it a little clearer for know-nothings like myself. Probably could use a quick read through for typos, etc.
jeann2013/securedrop,kelcecil/securedrop,jrosco/securedrop,jaseg/securedrop,heartsucker/securedrop,conorsch/securedrop,GabeIsman/securedrop,chadmiller/securedrop,chadmiller/securedrop,ehartsuyker/securedrop,garrettr/securedrop,GabeIsman/securedrop,garrettr/securedrop,GabeIsman/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,pwplus/securedrop,harlo/securedrop,jrosco/securedrop,garrettr/securedrop,chadmiller/securedrop,micahflee/securedrop,conorsch/securedrop,ehartsuyker/securedrop,conorsch/securedrop,kelcecil/securedrop,jrosco/securedrop,pwplus/securedrop,ageis/securedrop,heartsucker/securedrop,jaseg/securedrop,harlo/securedrop,kelcecil/securedrop,micahflee/securedrop,heartsucker/securedrop,ageis/securedrop,pwplus/securedrop,chadmiller/securedrop,jeann2013/securedrop,GabeIsman/securedrop,harlo/securedrop,micahflee/securedrop,jaseg/securedrop,jeann2013/securedrop,pwplus/securedrop,GabeIsman/securedrop,ehartsuyker/securedrop,harlo/securedrop,jaseg/securedrop,jrosco/securedrop,jeann2013/securedrop,chadmiller/securedrop,micahflee/securedrop,conorsch/securedrop,harlo/securedrop,ehartsuyker/securedrop,jrosco/securedrop,ehartsuyker/securedrop,chadmiller/securedrop,kelcecil/securedrop,ageis/securedrop,ageis/securedrop,garrettr/securedrop,conorsch/securedrop,kelcecil/securedrop,jeann2013/securedrop,kelcecil/securedrop,harlo/securedrop,jrosco/securedrop,jaseg/securedrop,pwplus/securedrop,pwplus/securedrop,jeann2013/securedrop,GabeIsman/securedrop,heartsucker/securedrop,jaseg/securedrop