D2003: util: extract all date-related utils in utils/dateutil module

[durin42 (Augie Fackler)]

durin42 added a comment.


  I think this is a reasonable approach. Do mark the copy though for blame preservation, and make sure to add utils/__init__.py and add mercurial.utils to the setup.py
  
  Thanks!

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2003

To: lothiraldan, #hg-reviewers, durin42
Cc: mharbison72, durin42, mercurial-devel