#DevDaysTransylvania

Started this from scratch as much of the patch no longer applied. I've updated other tests that call something similar to createBlockContent with the trait where possible with aliases.

I've also added another optional $values parameter to createBlockContent to support tests which were passing these to their own functions, we can then deprecate the $title and $bundle params at a later date if required.

Just added an ExcelImageFormatter allowing to insert images into your exported Excel files:

Implemented a basic string formatter that adds a configuration option allowing to collapse/hide a column.

Any feedback will be greatly appreciated.