stardate: compute the current TNG stardate

Danny Yoo <dyoo@hashcollision.org>

(require (planet dyoo/stardate:1:=0))

The package computes the current stardate based on the scheme used by Star Trek, The Next Generation.

> (require (planet dyoo/stardate))

> (require racket/date)

> (date->stardate (current-date))

"65741.5"

Note: this package has not yet been reviewed by the Starfleet Corps of Engineers for is accuracy, and should not be be used for galactic archival purposes.