Prettifying the print out.
Include the walker into mocleaner.

We keep walker.go for now.
Write out copies for now and ignore directories themselves.
Write out trimmed content to temp file and then replace the original.
Missing newline cleaned up by mocleaner.go :-)
Move the orginal walker.go out of the way but keep it for now.
Adding a Makefile for cross compliation.
Adds some documentation to the README.