fix for old C#

cleanup code a bit (fix compilation on unity)

change lockfree to locks because of possible ABA problem

add volatile again

add volatile again

fix info in InvalidTypeExceptions. Fix for list serializing for fastc…

…allstatic (fix RevenantX#390)

update docs

add List<T> support for NetSerializer/PacketProcessor for custom type…

…s. Improved PacketProcessorExapmle

improve speed on NetDataReader/NetDataWriter for arrays

fix unreliable channel