CZ.Dates refactoring:

1. Rewrited methods GetCoordinateFromDMY, GetDMYFromCoordinate,IsLeapYear with account of leap years.
2. Deleted unnesessary and unused methods.
3. Changed timescale with account of new representation of zero point of time.
4. Rewrited Unit Tests for dates.ts.
5. Code review improvements, specified by Javier
6. Bug fixes for 354,34,403