Upgrade to work with Spree 2.0
Update Versionfile
Replace number_to_currency uses with Spree::Money ones

Fixes #31
Correct virtual_path for print buttons override

Fixes #34
Remove extra bracket from _totals.pdf.prawn

Fixes #36
Fix styling of print invoice button
Remove bye partial
Find image using Rails asset pipeline
Reference @order variable within _totals partial
Allow to use numeric sequential invoice numbers
Depend on 2.2.0.beta
Only show eligible adjustments

Fixes #42
Update gemset for spree 2-2 and add order_number translation
Merge pull request #1 from jtapia/2-2-stable

Update for spree 2-2