Update notes for submitted changes
* pgm: Handle IOException in Version command
* pgm: Fix missing braces in UploadPack.run()
* pgm: Handle IOException in UploadPack command
* pgm: Handle exceptions in Tag command
* pgm: Fix missing braces in Status.run()
* pgm: Handle exceptions in Status command
* pgm: Fix missing braces in ShowRef.run()
* pgm: Handle IOException in ShowRef command
* pgm: Fix missing braces in Show.run()
* pgm: Handle exceptions in Show command
* pgm: Fix missing braces in Rm command
* pgm: Handle GitAPIException in Rm command
* pgm: Handle exceptions in RevParse command
* pgm: Externalize error message