Set version to 1.5
Update copyright
Changed licence to GPL 3 or later.
No release yet
Fixed license in the UI
Ignore backup files
Merge branch 'master' of github.com:nijel/ukolovnik

Conflicts:
	index.php
	lib/category.php
	lib/compat.php
	lib/config.php
	lib/extensions.php
	lib/html.php
	lib/http.php
	lib/locale.php
	lib/priority.php
	lib/sql.php
	lib/string.php
	lib/toolbar.php
	lib/version.php
	setup.php