context manager cache.flush_disabled()
Remove cache.saving flag
reverting commit 498b405e: db.insert(...) causes cache.flush() again
Disconnect bug fixed: Database.generate_mapping() perform rollback instead of commit even with create_tables=True
Remove redundant EntityMeta._get_cache_() method
Remove Entity.check_on_commit() method and 'to_be_checked' object status
Renaming: cache.to_be_checked -> cache.objects.to_save
Object status renaming: 'deleted' -> 'marked_to_delete'
Remove unused sets cache.created, cache.updated, cache.deleted
Cosmetic change
Code simplification
micro optimization
Rearrange some methods
Move stuff around
Refactoring of DBSessionContextManager.__exit__() method
Merge master into orm: refactoring and bugfixes
Remove PyGreSQL support
Remove problematic stuff from pony.orm.dbproviders.sqlite module
Refactoring: remove _init_connection() internal function, move code to SQLitePool.connect()
Merge master to orm: remove obsolete stuff