Property definitions

github $ ContributorWeek :: defaultinit
# Contributor stats weekly hash
class ContributorWeek
	serialize

	# Start of week given a Unix timestamp
	var w: Int

	# Number of additions
	var a: Int

	# Number of deletions
	var d: Int

	# Number of commits
	var c: Int
end
lib/github/api.nit:1034,1--1049,3