Changes for CF-1.8

[davidhassell]

Addresses:

• Implement simple geometries for CF-1.8 #11 Implement simple geometries for CF-1.8
• Implement string data-types for CF-1.8 #12 Implement string data-types for CF-1.8

But does not address:

• Implement groups for CF-1.8 #13 Implement groups for CF-1.8