Reworked total templates to support coupon lines, and started support for multiple shipping methods per order.

@todo store shipping methods in the order
@todo test with PP shipping real world

cc @coe
Made methods static that were referenced from static
Cleaner orders items, and show meta in text until editing.

@coenjacobs this commit has the urldecode fix. Will move it over to
master/.14 later
Tweak help strings
Order panel improvements + save multiple shipping methods
Expand when calculating totals
Merge branch 'Dynamic-total-rows'

Conflicts:
	assets/css/admin.css