====== Time Zones ======
 
  * to compile new time zone data on a linux machine; this was done on Fedora.
  * run 'ftp ftp.iana.org'
  * user is anonymous and password is your email address
  * 'cd tz'
  * 'get tzdata-latest.tar.gz'
  * 'get tzcode-latest.tar.gz'
  * 'quit' ftp
  * create a temporary time zone directory, e.g., /home/donald/tz which we will call TopDir
  * move both *.gz files to TopDir
  * change to TopDir
  * run 'tar -xzvf tzdata-latest.tar.gz'
  * run 'tar -xzvf tzcode-latest.tar.gz'
  * do 'chmod 666 Makefile to make it read/write.
  * edit Makefile and change the line (number 40) TOPDIR=		/usr/local to TOPDIR=		/home/donald/tz
  * save Makefile
  * run 'make other_two' This will create $TopDir/etc/zoninfo-posix and $TopDir/etc/zoneinfo-leaps. The former has Dst info and the latter has Dst info and leap seconds.
  * Copy both of these directories (and their sub-directories) to $VaRoot/zoneinfo. 
  * Add these lines to the template that creates the abt.ini file for Windows

        [Timezones]
        zoneinfoPath=$VaRoot/zoneinfo/zoneinfo-posix

  * --- stic 2012 ------------
  * Time class mutateObj*. see Time test case.
  * do not deprecate ANSI methods
  * use Dumper -> byteArrya and put contents in method.
  * does windows have historical tz data?
  * create an exception for bad dt and proceed wiht something.
  * don't use abtError
  * do explain mismatched preregs
  * deprecate old dt constructors and make list
  * look at subApp config expressions
  * read single files.
  * find system call to get tz info on linux
  * make offset: do the right thing
  * create GMT+1:34 on the fly
  * get rid of offset as an instVar
  * read versionString
  * ------------------------------
  * chronos download is b196. vw pulls b202 from contributed.
  * Chronos uses instances of either CalendarDuration or CivilDuration to represent durations of civil time.
  * An interval of time has a beginning, and end, and a duration. 
  * DateAndTime now return the current date and time with an offset (a Duration) of 18000 seconds or 5 hours. The offset comes from the primitive primitiveSystemOffset.
  * sending asUTC to that object add the negated duration to the time and sets offset to zero. so asUTC is the same as converting to GMT.
  * sending asLocal reapplies the systemOffset and sets the offset to that of the system
  * timeZoneName is not implemented and throws an error
  * --------
  * How to write a DST primitive?
  * What does chaining TimeZones together mean?
  * Will DateAndTime calculations now always involve TZs?
  * Olson versus tz?
  * Ubuntu may have tzName in /etc/timezone
  * Fedora will have tzName in /etc/sysconfig/clock
  * Aix has a TZ= line in /etc/environment