New parameter interface: to do's

[odunbar]

• [x] Functionality to load Arrays of Floats (not just floats). using a get_parameter_array!(...) method.
• [x] CES getters for prior/transformations etc.
• [ ] String processing - (e.g. trimming/capitalization etc?)
• [ ] Style guide for parameter naming conventions - in accordance with the string processing
• [ ] [Once conventions are resolved] Changing from alias to name-based parameters
• [ ] ...