Add HOWTOs converted from MediaWiki
Add titles to HOWTO pages
Add HOWTO images
Add summaries to HOWTOs
Remove outdated GTK-based app setup HOWTO
Move app HOWTO images into page dirs
Remove app name from HOWTO image file names
Remove category links from HOWTO pages
Update and reformat app HOWTO quotation references
howto: Make sources be part of quotations
howto: Fix Krita 2.4 release notes reference
howto: Fix Alchemy instruction list formatting
howto: Fix link to linuxwacom's CTM description
howto: Add relevant notes/warnings lost in conversion
Fix unreliable top menu selection
Add space before menu link class attribute
howto: Remove invitation for sending diagnostics
howto: Fix evdev formatting and missing tips