Battle for Wesnoth 1.6+dev - en to unknown language translation catalogue (4 entries)

note: [campaign]: id=LOW, type=hybrid
en: (Easy)
target: (Auðvelt)

note: [campaign]: id=LOW, type=hybrid
en: (Normal)
target: (Venjulegt)

note: [campaign]: id=LOW, type=hybrid
en: (Hard)
target: (Erfitt)

note: [message]: id=Kalenz
en: We won!
target: Við unnum!
