calender-timezones: remove no longer needed helper files

The calender-timezones package isn't available any longer since melting
into Thunderbird/Icedove before version 24.
debian/control: sort various fields alphabeticaly

also a really small typo
remove this file, it's confusing git-pbuilder

   !!!! Do not pick this commit !!!!
icedove branding: adopting current Makefile.in style from upstream

To get the branding usable within multiple build directorys we need to
change the Makefile.in files to the current needs.
debian/rules: switching to debhelper

Adding the needed changes that comming by the switch to debhelper
as build system. Finally are more changes to the rules file needed.
debian/mozconfig*: adding mozconfig files

Adding various mozconfig files for building ID and it's corrosponding
debug binarys.
There is 'mozconfig.default' that includes the basic instructions for
all builds. This file is included later by any other mozconfig files to
use the variables there.
debian/icedove.configopts: file no longer needed

The configuration for the package(s) build is now held inside the mozconfig
files.
switching the old thunderbird*.in files to icedove.*

By removing the the applications name switch in the rules files the old
debian/*.in files are not needed any longer. We only building Icedove
related packages.
Depending on this we also don't need to take care about application
names in the menu or post and preinst scripts. Removing all old
substitutions variables inside the files.
debian/icedove.links: adding helper file for needed links
debian/icedove.dirs: adding helper file for needed directorys
debian/icedove.install: sort entrys alphabetical
debian/icedove.js: fix small typo and reformating
debian/rules: adding part for dh_fixperms
debian/rules: c-g-p and iceowl-extension needs special handling
debian/rules: tuning install of branding related files
debian/rules: remove duplicated files from i-dev package
debian/rules: adding override for dh_shlibdeps
debian/rules: adding override for dh_builddep