check alignment of all atomic vars

## Problem

On 32 bit platforms (ARM) `sync/atomic` operations can crash if a 64 bit value is misaligned.

## Solution

Create unit tests that use `unsafe.Offset` to check if that `% 8 == 0`

See `network/wsPeer_test.go`

## Dependencies

None

## Urgency

Nice-to-have. 32 bit platforms aren't much used.