fixed typos in install docs
fixed typos in install docs

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