Add Logging

[dlukeomalley]

Data is king when doing scientific or lab work. I would like to add a logging feature to the build and flashing script so that I know when and what I've worked with on the board. I see it being helpful if something goes terribly wrong, I can reproduce the errors, etc. This would include things like:

Datetime
Current git commit (so I can get back to the program later)
Program path
Time to transfer
Size
Time to complete
Reported Errors
etc