Addresses #71 :
Set version on the CLI framework.
Add a build.sh script that injects variables into the build tooling using git and a version file.
Set version in config.
* new styling for frontpage, update login and authorize templates
* run go fmt
* add AssetBaseDir to command flag parsing
* untested: move landing page to it's own router
* go fmt, fix typo
* fix package, adapt to proper Route structure
* add host and protocol options
* some fiddling
* tidying up and comments
* tick off /oauth/token
* tidying a bit
* tidying
* go mod tidy
* allow attaching middleware to server
* add middleware
* more user friendly
* add comments
* comments
* store account + app
* tidying
* lots of restructuring
* lint + tidy
