Initial commit of titledb import command.
Further progress on titledb import command.
Titledb xml is now read and AUs are counted.
Committing deletion of PLNImportCommand.php
This is now two seperate commands - plugin import and titledb import.
getPluginsId now returns the LOCKSS plugin ID.
Cleaned up import command code base.
It can handle smaller titledb XML files.
get the plnpluginimport command working again after I broke it with API changes in the CRUD bundle.
Get the plntitledbimport command working again.

 - Make Aus::__toString() return something, even if it is a useless thing.
 - relax all of the null restrictions on Aus.orm.yml
 - Have AuProperties cascade persistence to parents and children as necessary.
 - Many changes to the actual command file.
Merge branch 'plnimportercommand' of github.com:ubermichael/lockss-o-matic into plnimportercommand

* 'plnimportercommand' of github.com:ubermichael/lockss-o-matic:
  Add some documentation, and make sure that the plugin_identifier (a java FQCN) is being imported.
  refactor the plnpluginimport command quite heavily.
  Get the plntitledbimport command working again.
  get the plnpluginimport command working again after I broke it with API changes in the CRUD bundle.
  Cleaned up import command code base. It can handle smaller titledb XML files.
  getPluginsId now returns the LOCKSS plugin ID.
  Committing deletion of PLNImportCommand.php This is now two seperate commands - plugin import and titledb import.
  Further progress on titledb import command. Titledb xml is now read and AUs are counted.
  Initial commit of titledb import command.
  add some missing CRUD form widgets - must have been missed when updating the schema.
  Get the plntitledbimport command working again.
  get the plnpluginimport command working again after I broke it with API changes in the CRUD bundle.
  composer update.
  Cleaned up import command code base. It can handle smaller titledb XML files.
  getPluginsId now returns the LOCKSS plugin ID.
  Committing deletion of PLNImportCommand.php This is now two seperate commands - plugin import and titledb import.
  Further progress on titledb import command. Titledb xml is now read and AUs are counted.
  Initial commit of titledb import command.