commerce_checkout_progress 7.x-1.4

Changes since 7.x-1.3:

• #1997406 by perusio, nvahalik: Disable links to guarantee form data integrity
• #2233111 by malberts: Not visible when using panels
• #1942390 by spiffl: Selecting visibility of checkout panes hides progress indicator everywhere
• #1508472 by mrfelton, deggertsen: Ability to dynamically specify wether checkout page should be included in the progress bar
• #1948096 by andrewbelcher: Silent and unneccesary dependency on commerce_cart