Initial draft of the new Fileset objects (See #9821)

Though there are likely other types and fields needed,
I'm uploading this so everyone can take a first look.
Removing OmeroImporter component entirely.

Only those files that are of use (src/*/cli and test/)
have been moved to blitz/
Container: Remove isBigImage flag from 3f976a99bc
Container: move all docs to getters
Container: Remove metadataOnly flag
Container: Remove projectID
Container: remove archive flag
Container: remove bf{ImageCount,Pixels,ImageNames}
Container: remove useMetadataFile
ImportableObject: remove copy
Config: remove serverList
Container: (etal) Remove image/plate distinction for name, desc
Container: Remove RemoteImportContainer
4.5DEV DB with fileset objects
Insight: initial cleanup of importImage
Container: add fillData method for preparing import
4.5DEV__1: minor changes to fileset types

 * Put `bioformatsReader` back inside versionInfo
   in order to have both a client-side and a server-
   side copy.

 * Make `FilesetActivity` a link-like object to `Job`

 * Add a few more activity names

 * Make usedFiles order. First element == target
Add postClose support in AbstractAmdServant
Remove unused FILE_SIZE_STEP
Major refactoring of Repositories.ice (in-progress)

This commit provides a compiling (but not functioning)
refactoring of the ManagedRepository service. Specifically,
a stateful service ("ImportProcess") has been introduced
to manage all of the client interactions throughout an
import.