Changed package structure

Changed package structure and added some documentation.

Signed-off-by: Don Willems <don_willems@me.com>
Time UTC, TT, TDB

Created time conversions for UTC, TT, and TDB.
UT1 still to do.

Signed-off-by: Don Willems <don_willems@me.com>
Added test cases

Added test cases for Time.

Signed-off-by: Don Willems <don_willems@me.com>
Added UT1

Added UT1 (determineer via internet file wit UT1-UTC data).

Signed-off-by: Don Willems <don_willems@me.com>
Better rounding for conversion from Julian Date (a double) to time (long).

Signed-off-by: Don Willems <don_willems@me.com>
Calculate ephemeris

Started work on calculateEphmeris

Signed-off-by: Don Willems <don_willems@me.com>