Imports of package internal

PathSynopsis
github.com/alecthomas/chromaPackage chroma takes source code and other structured text and converts it into syntax highlighted HTML, ANSI- coloured text, etc.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
sortPackage sort provides primitives for sorting slices and user-defined collections.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.