Add further test data.
Change DiscordianEra into Enum
Change Era titles
Add JSR310 bp blurb, re-order methods
Remove author line
Fill in with basic implementation.
Add JSR310 bp blurb
Change class comment.
Add member variables, constructor, accessors.
Add comment clarifing length of month "seasons".
Implement DiscordianDate.getChronology(), correct type of
DiscordianChronology.INSTANCE
Implement now(Clock)
Add basic implementation.
Redirect flow of DiscordianDate.of(...) methods.