Jamo Korean 0.6.0 Update

[John Dykes]

Hi Jamo Korean testers,

Be sure to download and test the new update: https://play.google.com/store/apps/details?id=com.jamolabs.korean_app 

Here are the release notes:

• Better responsive design on small screens
• Simplify exercise architecture, removing unnecessary "introduction" versions of exercises
• Work on adding IOS support

Let me know if there are any issues!