Metric Service

[MiniDigger]

replaces #77

backend service that provides analytical data to developers. similar to bstats but hosted by vgl team for max expandability.

stats to track:

• server location
• server core count
• server system arch
• server os
• server version (full)
• minecraft version (1.7, 1.8, 1.9, 1.10, 1.11, 1.12, 1.13, including sub versions)
• server brand (craftbukkit/spigot/paper)
• java version (7,8,9,10, including sub versions)
• online mode (including bungee)
• vgl version
• player count
• gamemodes

optionally (opt in?) report server name, website and ip (defined by user) to the service so that it can generate a "Servers using vgl" list.

[MiniDigger]

meh, lets roll with bstats custom graphs for now