Amethyst 0.26.1: BugFix for @nostrich and @nostrich

- Fixes non Hex keys in the contact list
- Fixes duplicated follows in contact list.

Downloads:

Google: https://github.com/vitorpamplona/amethyst/releases/download/v0.26.1/amethyst-googleplay-universal-v0.26.1.apk

F-Droid https://github.com/vitorpamplona/amethyst/releases/download/v0.26.1/amethyst-fdroid-universal-v0.26.1.apk