shorten 6.x-1.4

This release mainly adds new features, but it is recommended for everyone. You must run upgrade.php after upgrading.

Changes:

#468116 Easier way to copy out status [shortened URL in block is auto-highlighted]
Choice of service for block is now persistent for each session
#511524 by rkdeveloper - accept urls more than 255 charecters long
#520068 by seanr - Add page to menu and permissions to restrict by role [there is now a page with a form to shorten urls]
#546562 Please add PeekURL.com to the list of services
#467256 Allow use of accounts with shortening services [This allowed adding adjix.com and bit.ly plus an optional API key for cli.gs]
Added qr.cx to services
#543306 Token Support [allows Trigger/Actions/Rules integration]