Ported timeconvert from DayTime to TimeTag. There are some slight differences:   When scanning a time, say year/month/day, the current system time is no longer filled in as the time-of-day in the output.  00:00:00 is used instead.   The new -c --civil option accepts both the old --calendar and --rinex time formats.   The -r --rinex option has been removed.   Partially specified times are acceptable. The missing parts are filled with zeroes or ones as appropriate.
Ported timeconvert from DayTime to TimeTag.
There are some slight differences:
  When scanning a time, say year/month/day, the current system time is no longer filled in as the time-of-day in the output.  00:00:00 is used instead.
  The new -c --civil option accepts both the old --calendar and --rinex time formats.
  The -r --rinex option has been removed.
  Partially specified times are acceptable. The missing parts are filled with zeroes or ones as appropriate.

Added several new defined input formats: ANSI, GPSEpoch/Week/Second, GPS 29-bit Zcount, GPS 32-bit Zcount, and Julian Date.
Added the ability to specify mixed input formats. i.e. year/day-of-year/H:M:S, year/month/day/seconds-of-week, etc.



git-svn-id: 6625e4d6743179724b113c04fbf297d122273a36@320 108fab2b-820f-0410-9f2c-e5cc2c41d7be

ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk