[merge] developer docs on ppa packaging

[Martin Pool]

More updates and clarifications of PPA packaging practices.  I split
them into a separate file to make the regular release checklist more
wieldy, so I've also attached a diff with just the text changes to
that section.

-- 
Martin <http://launchpad.net/~mbp/>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20080723-ppa-details.diff
Type: text/x-diff
Size: 6696 bytes
Desc: not available
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20080723/dc2592c8/attachment-0002.bin 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20080723-doc-ppa.diff
Type: text/x-diff
Size: 18944 bytes
Desc: not available
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20080723/dc2592c8/attachment-0003.bin