Read GNU Coding Standards 6.7 
http://www.gnu.org/prep/standards/html_node/NEWS-File.html#NEWS-File

Example: http://git.savannah.gnu.org/cgit/make.git/tree/NEWS

YourProject NEWS
  History of user-visible changes
  25 Jan 2015

See the end of this file for copyrights and conditions.


Version 1.0.0

  * New features: XXXX
    Description of the feature