[CCUT] extend support for more types

[basels]

Currently these units return errors, need to add support.

Units not defined:

%
percentage / 100
day/m^(1/3)
YYYY-MM-DD
C-day
1/m

Unknown types (for symbol):

date
decimal
deg C (degC works)
kg kg-1 (kg/kg works)
degrees
percent
ppm

Originated in this issue.