Bump version number to 1.0

Also to the changelog file all the intermediary versions used to test
Maemo's automatic builder.

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Changes to be committed:
#   (use "git reset HEAD^1 <file>..." to unstage)
#
#	modified:   debian/changelog
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	debian/.control.swp
#	debian/files
#	debian/status-area-displayblanking-applet.debhelper.log
#	debian/status-area-displayblanking-applet.substvars
#	debian/status-area-displayblanking-applet/
