Add method to execute migration

server/methods/migrate.coffee

+Meteor.methods
+	migrate: (version) ->
+		user = Meteor.user()
+
+		if not user? or user.admin isnt true
+			return
+
+		this.ublock()
+		Migrations.migrateTo version
+		return version
+
+	getMigrationVersion: ->
+		return Migrations.getVersion()
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