Start the option[T] type
Add parsing of the option type
Starting to add ckernels for option[T] where T is a builtin type
Finish the bool na classification/assignment functions
Implement print function for the option type
Add is_avail and assign_na for int##, float##, complex[float##]
Changes to bool/int parsing code, json parsing works with ?bool now
Add ckernels for assigning between option types
Some more tests, make the option[builtin] types be static instances
Some more option assignment tests
Add some custom googletest assertions for dynd arrays
Simplify/fix the option assignment kernels slightly
Change over some tests to use the new googletest macros
Add json formatting, fix up option[real] parsing, more tests
Add nd::assign_na function
Add option type handling to promote_types_arithmetic
Formatting changes
Don't allow nesting of option[option[T]]
Merge pull request #54 from mwiebe/option_type

Option type