**Changelog**
Library:
* Breaking: `RepublicanDate` methods have been renamed for improved consistency.
* Streamlined behaviour for complementary days to match normal days for a cleaner interface.
* Time represented as a decimal number (e.g. 0,84365 instead of 8:43:65) available through the `decimal` property of `DecimalTime` objects, or the _%D_ format placeholder.
* Format placeholders for capitalization of month and day names.
* Default formatting can be set using environment variables.
CLI:
* Breaking: converting a specific date and time has moved from a positional argument to `-i / --input`.
* `-u / --utc-offset` option for using the current time with a specified offset from UTC.
* `-f / --format` without an argument will print a table of available format placeholders.
Bugs:
* Fixed issue when providing "aware" time objects to `DecimalTime.from_standard_time()`.
* Fixed roman numerals for years far in the future.