Callable identity accessors for InMemory
Callable identity accessors for FileSystem
Extracting AccessorLocator to separate objects
Update docs
Whitespace fixes
Rename IdentityLocator -> ObjectIdentifier
Merge pull request #1 from ciaranmcnulty/feature/callable-identity-accessor

Callable identity accessors
Fix the test name
Refactor FileRepository and InMemoryRepository
Remove unnecessary lines
PHP highlighting in examples
Clarify intent in the README
Merge pull request #2 from ciaranmcnulty/docs/fix-highlighting

PHP highlighting in examples
Fine-tune the clarification to be more realistic
Merge branch 'master' of github.com:everzet/persisted-objects
Fix bug where existing identifier are unexpectedly extendable
Switch var_export to serialize()
Fix the second example
Speedup the FileRepository by introducing internal cache
Merge branch 'master' of github.com:everzet/persisted-objects