Keep calm

[Jon Turney <jon dot turney at dronecode dot org dot uk>]

I've disabled upset (the perl script on sourceware.org, which performs 
the task of composing setup.ini from setup.hints and moving uploads), 
and enabled calm (a re-write from scratch to perform these tasks).  This 
is a test and may be reverted if things aren't working correctly.

Package maintainers may notice a few differences:

* Package maintainers no longer receive emails about everyone's uploads, 
only their own.

There is a list of addressees who receive emails about all packages, so 
if you wish to continue to receive those, please let me know and I'll 
add you to the list. :)

* Validation of the uploaded package and setup.hint is now much stricter

Many problematic usages which were silently ignored, or permitted and 
required manual intervention to fix, are now reported.