Imports of dumpscts command

PathSynopsis
compress/zlibPackage zlib implements reading and writing of zlib format compressed data, as specified in RFC 1950.
encoding/gobPackage gob manages streams of gobs - binary values exchanged between an Encoder (transmitter) and a Decoder (receiver).
flagPackage flag implements command-line flag parsing.
github.com/google/certificate-transparency-go/preloadPackage preload holds code for adding batches of certificates to CT logs.
ioPackage io provides basic interfaces to I/O primitives.
logPackage log implements a simple logging package.
osPackage os provides a platform-independent interface to operating system functionality.