Upgrade instructions

• v3.10.1: Change in HTML template for special blocks
  • Garbage
• v3.8.9: Dial styling
• v3.7.6: Dial values
• v3.7.3: Popup blocks and more
  • New blocks for ‘moon’ and ‘log’
  • Removal of ‘old’ calendar block
  • Styling of popup windows
  • Popup windows new functionality
  • New block parameter blocks
• v3.4.9: Custom keys in block definition
• v3.4.1: Redesign block definition
  • Block parameters
  • custom.js
• v3.2.0: Change in HTML template for special blocks
  • Block parameters
  • CSS class definitions