Imports of ast-to-pattern command

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
go/astPackage ast declares the types used to represent syntax trees for Go packages.
go/parserPackage parser implements a parser for Go source files.
go/scannerPackage scanner implements a scanner for Go source text.
go/tokenPackage token defines constants representing the lexical tokens of the Go programming language and basic operations on tokens (printing, predicates).
honnef.co/go/tools/patternPackage pattern implements a simple language for pattern matching Go ASTs.
io/ioutilPackage ioutil implements some I/O utility functions.
osPackage os provides a platform-independent interface to operating system functionality.
text/templatePackage template implements data-driven templates for generating textual output.