Create an adapt[] type, for generalizing date/datetime adaptation
Add file for implementing date adapter kernels
Got date adapters working, with tests, and some renames
Make the date adapter work in the opposite direction too
Add netcdf metadata-based adapter kernels for datetime
Change the adapt type syntax to use a function proto
Change printing of types to use single quotes more consistently
Switch from ref to pointer to avoid type-pun warning on gcc
Merge pull request #61 from mwiebe/adapt

Add an adapt[] type, as well as adapt functions for int to date and datetime