l10n: de.po: translate 35 new messages

Translate 35 new messages came from git.pot update
in 9caaf23 (l10n: Update git.pot (35 new, 14 removed
messages)).

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
Acked-by: Thomas Rast <trast@inf.ethz.ch>
l10n: de.po: translate 5 new messages

Translate 5 new messages came from git.pot update in 235537a
(l10n: git.pot: v1.8.2 round 3 (5 new)).

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
Acked-by: Thomas Rast <trast@inf.ethz.ch>
l10n: de.po: correct translation of "bisect" messages

The term "bisect" was translated as "halbieren", we should
translate it as "binäre Suche" (binary search). While at
there, we should leave "bisect run" untranslated since it's
a subcommand of "git bisect".

Suggested-by: Thomas Rast <trast@inf.ethz.ch>
Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>