Add Korean language

[diluculo]

Last sibling of #237

[tgjones]

Please could you rebase this?

[diluculo]

Done.

[tgjones]

Thank you!

[EchterAgo]

Hmmm, I don't know how but somehow this commit includes the text for AdvancedSliderCommitErrorFormat from #192 which has not been merged yet.

7d94cf9e (diluculo 2016-09-05 13:39:32 +0900 267) <data name="AdvancedSliderCommitErrorFormat" xml:space="preserve">

[diluculo]

After rebasing and resolving conflicts, I opened ResXManager and noticed the key was included. But I couldn't find it in codes, so I simply ignored it.

I can't find it in all my local branches, but it's more reasonable to say my initial PR had it, By the way, how can I fix this? new PR removing the key? or wait until the AdvancedSlider was introduced?

[EchterAgo]

Yes, you fix it by PR removing the key, or maybe I can get the advanced slider merged soon. Maybe it was my mistake when I cleaned up your initial PR.