Added indentation to script.
Toggle compositing on.
Added blink to urgent windows.
Show shadows.
Added transparency to windows when moving/resizing.
Decrease Syslinux boot splash timeout to 10 seconds.
Removed unused code (Jenkins build from Tails build script).
Allow passing COMMIT as env. variable.
Fixed syntax error.
Removed unused code.
Removed obsolete description.
Allow passing COMMIT variable.
Updated changelog.
Added less to required packages.
Added support for setting up DEBUG mode.
Allow boot option customization.
Removed old TODO note.
Fixed value for DIGABI_DEBUG (if enabled, value is 'true').
Updated DIGABI_DEBUG default value.
Merge branch 'pretty-ui'

* pretty-ui:
  Added less to required packages.
  Updated changelog.
  Decrease Syslinux boot splash timeout to 10 seconds.
  Added transparency to windows when moving/resizing.
  Show shadows.
  Added blink to urgent windows.
  Toggle compositing on.
  Added indentation to script.