#1008810 overhauled exportable entities so that all entities are stored in the database. Upgrade for modules making use of exportable entities is required, see #1008810-8.

 #708268 some metadata wrapper improvements, in particular fixed property updates to be properly reflected in parent data structures. API change: value() now doesn't throw an exception for not set properties any more, but returns NULL.

 #988780 API Change: merged both modules into a single one. Read http://drupal.org/node/988780#comment-3834560 for a detailed description of the changes.

 #710650 Entity Metadata: added validation to ensure the data type of set property values match. Also added support for an additional property info key that allows the specification of a validation callback.
Improved the provided metadata to validate mail addresses and ids to be positive and improved the tests to test validation.

   Instead of the previous fake 'system' entity, modules may provide metadata using hook_entity_propertiy_info() for the 'site', which is not registered as fake entity any more.
  'system' has been renamed to 'site' in order to be consistent with the existing tokens.
   Also fixed token integration to properly work with 'site' tokens and to properly chain through in case of properties referencing to entities.

  renamed key for additional metadata for data structures from 'data info' to 'property info' to reflect its content equals the returned info of hook_entity_property_info(). Therefore also removed the dataInfo() method, instead use getPropertyInfo() without arguments.
  added method entityInfo() to the entity wrapper.

fix E_STRICT compatibility by cleaning up references. As now references cannot be used optionally getters cannot return data by reference any more. If "references" are required though the EntityMetadataArrayObject may be used to wrap arrays so that changes to the wrapper are reflected in the passed array immmediately.
also remove the reference from the data argument of entity_metadata_wrapper() as it not needed any more

 #716060 Provide tokens for entity properties that don't have tokens yet. Thus this adds tokens for single-valued fields.

important bugfix: unsaved changes of entities were dropped. Fixed that and improved the tests to cover it.

 #715934 improve serialization of metadata wrappers and add a test case to ensure it's working right

changed entity_metadata_entity_create() to return a wrapper instance and support chaining for the save() and delete() method. That allows for calls like  = entity_metadata_entity_create(..)->save()->value();

Removed identifier flag in favour of supporting only the identifier mode. Thus entities are internally represented by their ids, thus setters/getters have to return those.
Setting entities using the wrapper now is possible by using the identifier or the object. Also it's possible to retrieve a list of entity ids by passing the option array('identifier' => TRUE) to the list wrappers value() method.

improve taxonomy metadata to make use of identifier and [] for adding new list values. Improved term parents to be a list of terms and to be settable.

 Support setting new entities by passing either the entity object or its identifier.

fixed the tests to correctly use the temporary upload directory for the file upload, so it runs on any right configured environment

make using underscores for getting  property wrappers possible, e.g. $w->taxonomy_tags so {} are required less often.