0.1.0 rc

Changes

• Quit the app from the menu bar
• Support opening at login

Fixes

• Add a separator to the application menu
• Simpler filename format
• Add a placeholder icon
• Use 'Thoughts' directory
• Add a settings view
• Add about screen
• Ensure the about screen opens on top of other windows
• Update the icon
• Always bring the compose window to the foreground
• Don't show the frontmatter in the compose window
• Don't save empty notes
• Set custom notes folders (#8)