Add out-file option to specify binary output

[llimllib]

• allow user to specify output file
  • Alec used pushup and was surprised that:
  • the binary was in build/bin/projectname.exe
    • he was surprised by the .exe extension - didn't think it was a unix binary
  • there was no option to specify where the binary was output
  • so this PR adds the -output-file option
• and add verbose flag
  • currently just outputs the go build command, as I think that's super high value, but should have other benefits in the future
• remove the default .exe suffix