Initial project governance

[sabre1041]

Added initial project governance documentation

[felixfontein]

Thanks a lot for working on this @sabre1041!

[felixfontein]

How about changing this to something like:

Suggested change

	Most votes require a simple majority of all Maintainers to succeed, except where
	otherwise noted. Two-thirds majority votes mean at least two-thirds of all
	existing maintainers.
	All votes require that the number of votes in favor of the motion exceeds a threshold.
	In case of most votes, this is a simple majority of all persons that are entitled to
	vote, which usually is the group of all Maintainers:
	in these votes, the number of votes in favor of the motion must exceed half of the
	total number of Maintainers.
	In cases explicitly noted, the required number of votes in favor can be higher,
	and/or only a subset of all Maintainers are entitled to vote.
	Two-thirds majority votes (usually called "2/3 vote") require that the number of
	votes in favor of the motion is at least 2/3 of the total number of persons entitled
	to vote.