Fix indention.
Add <title> (more procrastination).
Fix border-left for .select2-arrow and position of arrow-image for .select2-dropdown-open and select2 v3.4.x.
Add optgroup and "allowClear" examples.
Merge styles targeted at select 3.3.2 and 3.4.x.
Prevent FOUC for .select2-allow-clear.
Add a placeholder to .select2-allow-clear.
Add a placeholder for a multi-value select, too …
Add examples for prepended checkbox and radio.