Add appendByte to SliceOutput
Add testing assertion utility
Add Slices.copyOf
[maven-release-plugin] prepare release 0.5
[maven-release-plugin] prepare for next development iteration
Fix warnings in Slice
Deprecate Slice.toUnsafeSlice

Replace with Slices.wrappedDirectBuffer
Add convenience method Slices.allocateDirect
Extract JvmUtils
Add ByteArrays for reading from byte arrays