Adds replacement_for basics
Merge branch 'master' into membership_replacement

Conflicts:
	seantis/kantonsrat/upgrades.zcml
Adds upgrade to new membership type
Show 'replacment for' information on organization members list
Updates German translation
Adds proof of concepty implementation of active/inactive members
Active/Inactive members are now determined without calling getObject
Adds membership replacement_for validation
Update German translation
Adds tests for active/inactive members
Updates history