Added Swedish weekdays

Did a test compile on cloudpebble, and it works as I wanted it to. Cant test the configuration page, but it should work.

Im not sure if/or I need to change both of the values on line 156 in pebble_one.c. I changed the first one and the code compiles in cloud pebble.

In the appinfo.json file, i updated both the version code and the version label, not sure how you want it...