debian/MPL-1.1: adding Mozilla MPL-1.1 license
debian/control: removing b-d on maxVersion for icedove-dev

The xul-ext-sogo-connector also works with non long supported versions
of Icedove (Thunderbird) so there is no need for a maxVersion on
icedove-dev. By this the extension can be always build with any version
escpecially in testing or unstable.
Thanks to Paul van der Vlis for reporting this.
debian/copyright: rework the whole copyright file

After rejecting by the ftpmasters (that was obviously correct) checking
all source files again and splitting of the various copyright and
license informations more granulay.
debian/docs: adding some already shipped doc files

Inversa is shipping the old changlog in the file 'ChangLog.old' and the
current changelog in 'RELEASE-NOTES'. Adding both to /u/s/d/x-e-s-c/.
Also adding the MPL-1.1 license as some files in the source are licensed
with that license.
lintian: adding a override for wrong complained issue

Lintian is complaining about a misspelled changelog file. This can be
ignored as this file only contains the old changelog entrys.
document changes and release 24.0.5-1