Imported Upstream version 34.0~b1
Merge tag 'upstream/34.0_b1' into debian/experimental

Upstream version 34.0~b1

# gpg: Unterschrift vom Di 11 Nov 2014 21:41:27 CET mittels RSA-Schlüssel ID 251D1DB0
# gpg: Korrekte Unterschrift von "Carsten Schoenert <c.schoenert@t-online.de>"
rebuild patch queue from patch-queue branch
adjust icedove depends >= 34.0~ and icedove << 35
document changes and release 1:34.0~b1-1