Allow configuration to use a MPSC queue instead of only a SPSC

[cjappl]

Currently, it's required that there is only one thread doing RT Logging (enqueuing ), and another doing the actual loging (dequeing)

ReaderWriterQueue is SPSC, we could possible use ConcurrentQueue by the same author to support multiple realtime threads.

[cjappl]

On revisit with the new issue that is filed, we would have to make sure concurrentqueue is wait free in whatever configuration we use it in.

According to real-time 101 there ARE wait free write MPMC queues but they must overwrite on full

[cjappl]

Related to #14

[cjappl]

Currently in flight #33

[cjappl]

Closed via #33