Support for parameter 'list' hinting

[alistairjevans]

In earlier iterations of AutoStep, parameters could have 'list' semantics by placing attributes on a method parameter.

The language should allow a parameter to be hinted as type 'list', like so:

Step: Given I have entered {values:list} into the control

This should result in standard and/or list splitting, and passing the appropriate structure to the backing method.

So, given a invocation of:

Given I have entered 'value1, value2, value3' into the control

A resulting structure of array or 'split list' would be passed to the backing method.