Regenerated gemspec for version 0.4.0
Regenerated gemspec for version 0.4.0

dimko/pdfkit,gdi2290/pdfkit,centresource/pdfkit,ContinuityControl/pdfkit,pdfkit/pdfkit,cdwort/pdfkit,globalxolutions/pdfkit,asomanescu/pdfkit,asomanescu/pdfkit,christhekeele/pdfkit,christhekeele/pdfkit,toggl/pdfkit,globalxolutions/pdfkit