Rename "karma" to "experience"

as requested by Douwe
Norwegian (bokmål) strings
Trade logs visible to all members by default

The former behavior was to simply not show other members' trade logs
with a permission-denied message. Now, the suggested default is to let
anyone view any member's trade log. Otherwise, the trade log shows only
trades between the logged-in user and the other member.
Norwegian (bokmål) strings
Fix conflict marker in lex.pot
Maintain limitations on global trade log

Previously, the global trade log was limited to the same extent as other
members' trade logs. With the (optional) opening of trade logs, the
global log inadvertently was also included. Add a special check for this
log.

(There is a use case in that the member might want to filter their
personal log by date, but this would be better handled from that page
instead.)

Also, improve wording of the statement of limitations on the trade log.
Norwegian Bokmål strings
Global trade log shows past month by default
Change "Member ID" to "Username" in UI

This is a more familiar term for most users.
Norwegian (Bokmål) strings