Attention base developers: ChangeLog entries

[James Berry]

A note for developers working on the MacPorts base code:

  - It is your responsibility to keep the ChangeLog up to date with  
substantive changes in base.

  - Not only does this tell users what has changed, but it also helps  
us internally track what has changed.

  - Changes that haven't been released should be put in the  
"unreleased" section of the ChangeLog file.
    These will be rolled into the proper release by the "releaser",  
who is a bit like the "decider" ;)

  - Please annotate ChangeLog entries with your name and the revision  
number when possible.

Thanks!

James