Faction power missing placeholders

[Piotro0101]

Hello.
At beggining I'm sorry for my language.
There are placeholders for player's max power, but there are no max power for faction or formated power/maxpower.
I will be delighted if you will implement that at future, because it perfectly fits into scoreboards.

[dmccoystephenson]

I'm open to this, can you please open a work item?
https://github.com/Dans-Plugins/Medieval-Factions/issues/new/choose