Imports of package merge

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
encoding/binaryPackage binary implements simple translation between numbers and byte sequences and encoding and decoding of varints.
math/bigPackage big implements arbitrary-precision arithmetic (big numbers).
netPackage net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets.