[dataimport] remove size constraint handling We do not want to silently truncate data. If that is wanted, the application-specific importer should handle that itself. [v2: Keep the get_size_constraints function so applications don't have to reimplement it if they need to keep the truncate behaviour]

[dataimport] fix doc string to stop referring to the old API

[dataimport] drop duplicate init of MassiveObjectStore.sql

[dataimport] remove implicit commits from MassiveObjectStore Let the user decide when to commit the transaction.

[dataimport] drop extra indirection through MassiveObjectStore._initialized dict We already have self.__dict__, no need to add another one for a static set of keys.

[dataimport] remove remaining references to dataio from MassiveObjectStore In particular, rename metadata tables to live in the ^cw.* namespace.

[dataimport] rename logger from dataio.massiveimport to dataimport.massive_store

[dataimport] remove commit_at_flush parameter from MassiveObjectStore WARNING: the default value was True, but flush() now never commits.

[dataimport] remove autoflush_metadata from MassiveObjectStore parameters Hopefully not needed.

[dataimport] remove uri_param_name from MassiveObjectStore parameters It doesn't belong here.