Basic support for Unique index per tenant #1108
Basic support for Unique index per tenant #1108

# Conflicts:
#	src/Marten.Testing/Schema/UniqueIndexMultiTenantTests.cs
#	src/Marten/Schema/ComputedIndex.cs
#	src/Marten/Schema/DocumentMapping.cs

JasperFx/Marten,ericgreenmix/marten,ericgreenmix/marten,mysticmind/marten,mysticmind/marten,JasperFx/Marten,mdissel/Marten,mysticmind/marten,JasperFx/Marten,mdissel/Marten,ericgreenmix/marten,ericgreenmix/marten,mysticmind/marten