Tweak the Vdv Token parser to better deal with initial leading
white-space in quoted values.  For example:

rec; "     a"; "       b"; "     c";
Make the BASIS_VERSION_TEXT field in the MENGE_BEREICH.x10 file
optional.
Add file comments and toString(...) methods to a few model classes.
Refactor the way TravelTimes are stored in the Vdv452Dao.  Since we need
the TravelTimes sorted by StopPoint pairs in most situations, let's
store them that way from the start.
Add method to retrieve all Lines from the Vdv452Dao.
Add support for TransportCompany (ZUL_VERKEHRSBETRIEB) records.
Add support for DayType records (MENGE_TAGESART.x10).
Add support for Periods (FIRMENKALENDER).
Explicitly convert lines and stops, even if they aren't mentioned by a
journey.
Add support for generating calendar.txt and calendar_dates.txt entries
in conversion.
Allow TimeZone to be set from the command line.
Fix default agency timezone, url, and lang.
Tweak documentation.