Version 2.5.3

This release resolves the following issues / pull requests:

• #73: ApplyChanges should mark grandchild deleted
  • ApplyChanges failed to propagate deleted state to the 2nd level child entity if the 1st level child was also deleted.
  • Fixed with pull requests #73 and #91.
• #80: LoadRelatedEntities() - missing table in generated SQL
  • LoadRelatedEntities generated an exception when reference type inherited from a base class.
  • Fixed with pull request #93.
• #83: Support for multiple primary keys for reference types
  • Requested feature: LoadRelatedEntities should support reference types with composite keys.
  • Implemented with pull request #94.