Update README.md

- little typo in docker command line 
- added more preferred 'secure only' example

Remove generating of version.go

Add explanation on secure mode

tiny fix README.md

Hopefully, this closes https://github.com/9seconds/mtg/issues/49

Use mtg metrics only for prometheus endpoint

Log configuration on proxy start

This has to simplify the debugging because usually we do not know all
options which user used to start mtg.

Prometheus integration

Rework stats server

Decrease the number of used goroutines

"Secure only" mode

Switch to maintained UUID fork

Support of Go 1.11 modules

Support of default DC indexes