small template changes
xhtml2pdf replaced by WeasyPrint
Fixed error regards to field_icons attribute access from bika_listing_table
Error trace:
URL: /xxx/zinstance/src/bika.lims/bika/lims/browser/templates/bika_listing_table.pt
Line 525, Column 5
Expression: <PythonExpr (view.bika_listing.field_icons.get(uid, []))>
AttributeError: 'XXXView' object has no attribute 'field_icons'

Conflicts:
	bika/lims/browser/templates/bika_listing_table.pt
WeasyPrint setup