Update Norwegian Bokmål translation

[sandakersmann]

Update Norwegian Bokmål translation

[idrassi]

Thanks.

One small content issue before merging: the six password/automount failure messages still miss two causes that are present in the English source:

• PASSWORD_WRONG
• PASSWORD_OR_KEYFILE_WRONG
• PASSWORD_OR_MODE_WRONG
• PASSWORD_OR_KEYFILE_OR_MODE_WRONG
• PASSWORD_WRONG_AUTOMOUNT
• PASSWORD_OR_KEYFILE_WRONG_AUTOMOUNT

Please add Norwegian equivalents for:

• Volume uses an old algorithm that has been removed.
• TrueCrypt format volumes are no longer supported.

For example:

• Volumet bruker en gammel algoritme som er fjernet.
• Volumer i TrueCrypt-format støttes ikke lenger.

After that, I think this is ready to merge.