Update CHANGELOG.md

Version 0.1.7 RC 1

Update README.md

Release 0.1.5

Symfony 3.4 Compatibility

MongoDB Status Code Queries

This adds the ability to query a Status Code in Symfony 3.1+

Remove MongoDB TypeCasting

This fixes an inconsistency with MongoDB limits.

Stability Repairs

- Mongo Connections
- Bundle Configuration
- Instructions for Configuration

Packagist Badges

These provide basic information on our ReadMe.