v0.1.1

Working my way through some of the issues from the original app:

• Use shuffle instead of always random reminder (kmac/mindfulnotifier#55)
• Enable/render markdown in reminders (kmac/mindfulnotifier#23)
• Add black theme for OLED displays (kmac/mindfulnotifier#57)
• Enable/disable all reminders with given tag (kmac/mindfulnotifier#44)