add coveralls to travis
add coveralls to travis

pwplus/securedrop,conorsch/securedrop,heartsucker/securedrop,micahflee/securedrop,ageis/securedrop,ehartsuyker/securedrop,micahflee/securedrop,ehartsuyker/securedrop,conorsch/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,micahflee/securedrop,pwplus/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,ageis/securedrop,pwplus/securedrop,ehartsuyker/securedrop,ageis/securedrop,garrettr/securedrop,heartsucker/securedrop,conorsch/securedrop,pwplus/securedrop,garrettr/securedrop,pwplus/securedrop,ageis/securedrop,ehartsuyker/securedrop,garrettr/securedrop,conorsch/securedrop,heartsucker/securedrop,micahflee/securedrop,conorsch/securedrop,pwplus/securedrop,garrettr/securedrop