add support for branch name specification

upgrade getopt

spaces -> tabs

I was not aware at the time I wrote this code that tabs were the Golang
norm.

Use correct import host for submodules

Update documentation and service file

Parse command-line options with getopt

Move VanityServer into module, add go-get support

Fix typo in README

Gitignore binaries

Fix readme formatting

Add systemd service file and revise readme

Add install and usage information to README

create Makefile

Initial commit