NH-3103 - ManyToAny ByCode uses field customizer
Fix possible error in ASTNode
NH-3496 - fix sequence drop if sequence does not exist.
NH-2963 - Exception when map an IList(Of T) by Code in VB.NET
fixup! NH-2963 - Exception when map an IList(Of T) by Code in VB.NET
NH-3505 - Check transience via unsaved id to eliminate need for hydrating entities to get version.  Fixes lazy many-to-ones on versioned classes with stateless session updates.
Prepare to release 3.3.3.SP1.
build-common/common.xml: Also SP-versions must use a completely numeric version on Nuget, otherwise they are misinterpreted as pre-releases.
Merge branch '3.3.3.x' into 3.3.x
build-common/common.xml: Not sure what version this will be, but probably at least 3.3.4.