Simplification.
Derp.
Fixes issue with -[NSOutputStream (ReactiveCryptor) rcr_processInputStream:bufferSize:].
Adds -[NSOutputStream (ReactiveCryptor) rcr_processInputStream:sampleSignal:].
Tidy.
Tidy.
Tests -[NSOutputStream (ReactiveCryptor) rcr_write:].
Tests -[NSOutputStream (ReactiveCryptor) rcr_processInputStream:bufferSize:].
Tests -[NSOutputStream (ReactiveCryptor) rcr_processInputStream:sampleSignal:].