Remove lock after updating .changed file
Store infos about commits ready to be pushed in *.build files
try-prepare-repo: do hg qfinish
try-rsync-push: use *.build files to select what needs to be pushed

Also add a loop to look at new push needed every 15 minutes.
Remove the try-push script, now replaced by try-rsync-push
Update the README after the recent changes
Add status-page script

A script to create an html page listing the latest pushes to Mozilla
Try.