Get the FPF master signing key from a keyserver, closes #742.
Get the FPF master signing key from a keyserver, closes #742.

jaseg/securedrop,chadmiller/securedrop,ehartsuyker/securedrop,pwplus/securedrop,GabeIsman/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,garrettr/securedrop,heartsucker/securedrop,kelcecil/securedrop,jeann2013/securedrop,conorsch/securedrop,ageis/securedrop,ehartsuyker/securedrop,conorsch/securedrop,kelcecil/securedrop,heartsucker/securedrop,ageis/securedrop,jrosco/securedrop,garrettr/securedrop,ehartsuyker/securedrop,micahflee/securedrop,chadmiller/securedrop,jrosco/securedrop,heartsucker/securedrop,pwplus/securedrop,chadmiller/securedrop,jaseg/securedrop,conorsch/securedrop,jaseg/securedrop,harlo/securedrop,GabeIsman/securedrop,kelcecil/securedrop,jeann2013/securedrop,jrosco/securedrop,garrettr/securedrop,pwplus/securedrop,GabeIsman/securedrop,kelcecil/securedrop,GabeIsman/securedrop,harlo/securedrop,harlo/securedrop,micahflee/securedrop,harlo/securedrop,jaseg/securedrop,micahflee/securedrop,harlo/securedrop,chadmiller/securedrop,harlo/securedrop,ageis/securedrop,heartsucker/securedrop,heartsucker/securedrop,chadmiller/securedrop,micahflee/securedrop,ageis/securedrop,garrettr/securedrop,GabeIsman/securedrop,GabeIsman/securedrop,conorsch/securedrop,jaseg/securedrop,kelcecil/securedrop,kelcecil/securedrop,jeann2013/securedrop,jeann2013/securedrop,jrosco/securedrop,pwplus/securedrop,jeann2013/securedrop,pwplus/securedrop,jeann2013/securedrop,jaseg/securedrop,chadmiller/securedrop,conorsch/securedrop,jrosco/securedrop,pwplus/securedrop,ehartsuyker/securedrop,jrosco/securedrop