[#1422] ReadOnlyByteBuffer.isWritable() should return false
[#1430] Fixed byte order problem on little endian platforms that support Unsafe but not unaligned memory access.
[#1425] Allow to access the EventLoopGroups via the Bootstraps
[#1414] Use gathering writes in AbstractMemoryHttpData if the buffer is backed by multiple ByteBuffers

* This fix the bug which caused an UnsupportedOperationException when renameTo(...) was called and the underlying ByteBuf was backed by multiple ByteBuffers
[#1411] Correctly check for null in AbstractTrafficShapperHandler.read() and so prevent NPE