Runentry Pool Override Precedence fixed

A Pool override in a run entry has precedence over
Pool Level overrides in the job run.

If a Pool Level override is given, the Pool Level overrides
are used.

Fixes #169: Pool Overrides are overriden by "Full Backup Pool" Directive

Signed-off-by: Marco van Wieringen <marco.van.wieringen@bareos.com>
Tweak status scheduler output to cope with locales.

The %a and %b are locale specific strings which vary in lenght on each
locale. So we now keep track of the longest date string so we can align
the header right. For this to work we print everything into a temporary
buffer and keep track of the length and dump the whole output in one go
with the correct header spacing.
Status scheduler support also view in the past

Now we also can give negative days to the
"status scheduler" command thus see what
schedules were triggered in the past
Split storage package into two

- Split off the tape specific stuff into a bareos-storage-tape package.

This limits the number of packages that we depend on and only when
the user really want to backup to tape with his storage daemon he can
install this.