Fixed unit test following change in contract for strinc/FdbKey.Increment
FdbKeyRange.PrefixedBy("\xFF") should return [ "\xFF\x00", "\xFF\xFF" )
Validates values for SetLocationCacheSize and SetMaxWatches
Fixed broken tests due to recent changes
Fixed bugs in SliceListStream
Added unit tests for SliceStream and SliceListStream
Fixed incorrect byte ordering in Slice.FromFixedU64 + test
Fixed Slice.FromStreamAsync

- must call stream.CanRead before, because stream.Length will throw if stream is Disposed
- fixed chunk size bug in LoadFromBlockingStreamAsync
- added unit tests
Fixed Slice.ToGuid/ToUuid encoded as strings

- size is 36 and not 44 !
Moved FdbCounter into Common Layers assembly

- This is deprecated so should not be in the core client.
Fixed invalid prototype for FdbKey.Merge(Slice, Slice[])

- this method does not need to be generic !
- added unit tests
Removed unused methods from Slice and added more unit tests