add support for looking up all fingerprints based on user@domain
add support for looking up all fingerprints based on user@domain

maheshwarishivam/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,anvayarai/my-ChatSecure,guardianproject/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,anvayarai/my-ChatSecure,prive/prive-android,h2ri/ChatSecureAndroid,10045125/ChatSecureAndroid,maheshwarishivam/ChatSecureAndroid,joskarthic/chatsecure,eighthave/ChatSecureAndroid,bonashen/ChatSecureAndroid,kden/ChatSecureAndroid,n8fr8/AwesomeApp,guardianproject/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,bonashen/ChatSecureAndroid,bonashen/ChatSecureAndroid,kden/ChatSecureAndroid,h2ri/ChatSecureAndroid,Heart2009/ChatSecureAndroid,Heart2009/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,joskarthic/chatsecure,guardianproject/ChatSecureAndroid,prive/prive-android,h2ri/ChatSecureAndroid,Heart2009/ChatSecureAndroid,31H0B1eV/ChatSecureAndroid,31H0B1eV/ChatSecureAndroid,n8fr8/AwesomeApp,eighthave/ChatSecureAndroid,10045125/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,prive/prive-android,n8fr8/ChatSecureAndroid,prive/prive-android,joskarthic/chatsecure,maheshwarishivam/ChatSecureAndroid,n8fr8/ChatSecureAndroid,kden/ChatSecureAndroid,OnlyInAmerica/ChatSecureAndroid,10045125/ChatSecureAndroid,eighthave/ChatSecureAndroid,n8fr8/AwesomeApp,anvayarai/my-ChatSecure,OnlyInAmerica/ChatSecureAndroid,31H0B1eV/ChatSecureAndroid,n8fr8/ChatSecureAndroid,OnlyInAmerica/ChatSecureAndroid,OnlyInAmerica/ChatSecureAndroid