Daterange handler #2

[jonathanjfshaw]

Second attempt at daterange driver, allowing for named properties.

[jonathanjfshaw]

Addresses #160

[pfrenssen]

Which use case do you have for passing the values as a numeric array?

[jonathanjfshaw]

The most natural syntax seemed to me to be something similar to what we do for links:

    Given event content:
      | title                     | dates                                                              | 
      | Sweet Palm         | 2005-12-30 00:00:00 - 2005-12-30 04:00:00 | 

[jhedstrom]

@pfrenssen do the 3 steps @jonathanjfshaw outlined above work for you? If so, I (or you) can merge this.