Howard Hinnant fd485c5383 [X] Make months and years not convertible to seconds:
* The Gregorian average of months and years is an
  integral number of seconds.
* This patch slightly tweaks the average to make it
  not an integral number of seconds, and thus these
  units no longer implicitly convert to seconds.
* This will flag naive  mixing of years, months and seconds
  as a compile time error.
2015-08-05 21:11:50 -04:00
..
2015-08-02 15:56:48 -04:00
2015-08-02 15:56:48 -04:00