picks Cartesian nits
adds ability to pass gtest filters through shell wrapper
fixup time string layout
removes unneeded include stdlib.h
dds datetime object
updates regex for ISO8601 time zones
adds DateTime copy copy assing constructors
fixes bug in month regex and adds tests
first cut at Julian date. not validated.
adds NRC example
adds time zone to Jullian date calculation
adds NRC and APC Julian date calculators and unit tests
adds reverse Julian date calculators and unit tests
adds valid check to numeric constructor
adds throw to valid checker
adds Julian date modifier constants
adds wikipedia Julian date
adds wiki to method name
fixes hour regex to 24 hrs in a day not 60
fixes time zone minutes to [0,60)