Feature and bugfix release

This release features some new features and functionality implemented by community contributors.

• New examples for managing image creation and deletion
• Uses the newly implemented Proffer.afterCreateImage and Proffer.beforeDeleteImage events
• The shell can now strip behaviours when working, so that extra callbacks are skipped
• Fixed a bug when cleaning up a Table class with multiple upload fields
• SensioLabs Insights have been fixed
• Multiple fixes to the documentation in both the docs files and to the class doc blocks
• Updated the constraint of Imagine to pull any 0.6.* release to hopefully prevent Composer version clashes
• Deleting records will now correctly delete associated uploads if you are using a custom path class

Huge thanks to everyone who contributed code, issues and other ideas towards this release.