Add simpler configuration
Update README.md
Factory now transforms key for value_as_key dictionaries
Fix PHP 5.3 compatibility
Allow key transformation
Merge pull request #5 from Shivoham/feature/simpler-configuration

Add simpler configuration
Merge pull request #6 from Shivoham/feature/value-as-key-factory

Factory now transforms key for value_as_key dictionaries
Update README.md
Update README.md
Update README.md