finished re-org of network package

context/params/message.go

context/params/network.go

network/gateway/gateway.go

network/internal/internal.go

network/manager.go

network/message/manager.go

network/message/parse/firstMessagePart.go

network/message/parse/messagePart.go

network/message/parse/partition.go

network/message/reception.go

network/message/sendCmix.go

network/message/sendE2E.go

network/node/register.go

network/node/register_test.go

network/nodes.go

network/permissioning/register.go

network/permissioning/register_test.go

network/receive.go

network/rounds/check.go

network/rounds/historical.go