Took this as an opportunity to learn Go. Here's my solutions for the first set of problems.

• main.go - entry-point for command line interface
• package1.ba_ - exercises command line interface as per questions, rename to package1.bat
• package1\
  • package1.go - solutions
  • package1_test.go - exercise solutions as per questions
  • commandLine.go - command line commands
• histogram\ - encapsulate histogram creation\normalization\diffing
• cmd\ - command line processing utils