Re-add unit tests to travis config
Re-add unit tests to travis config

CSBill/CSBill,pierredup/CSBill,pierredup/CSBill,pierredup/CSBill,pierredup/CSBill,SolidInvoice/SolidInvoice,CSBill/CSBill,pierredup/SolidInvoice,pierredup/SolidInvoice,SolidInvoice/SolidInvoice,CSBill/CSBill,SolidInvoice/SolidInvoice,CSBill/CSBill