improved join.go
Transforms not working right. commit for backup only.
Some basic file operations

Will add mor ehere later
flag.go shows how to parse command line arguments

Uses the "flag" package
Just playing with pointers a little bit.
Shows how to walk a folder and optionally subfolders

Can be adapted to do a lot more
Just some simple slice examples
Added .gitignore
Added temp/* to .gitignore