finished initial structure of storage

api/client_test.go

api/mockserver_test.go

api/private.go

api/register_test.go

bots/bots_test.go

crypto/encryptdecrypt_test.go

io/processingrounds.go

io/processingrounds_test.go

rekey/rekey_test.go

storage/cmix/key.go

storage/cmix/roundKeys.go

storage/cmix/roundKeys_test.go

storage/cmix/store.go

storage/contact.go

storage/contact_test.go

storage/e2e/session.go

storage/e2e/store.go

storage/regStatus.go

storage/registration.go

storage/registration_test.go