Added invoice and invoice detail pages. Begin work on paginated invoices page.

client/src/translations/en_us/common.json

@@ -575,6 +575,7 @@
 				"profile": "Profile"
 			},
 			"header": {
+				"accounting": "Accounting",
 				"activejobs": "Active Jobs",
 				"availablejobs": "Available Jobs",
 				"courtesycars": "Courtesy Cars",
@@ -583,6 +584,7 @@
 				"courtesycars-newcontract": "New Contract",
 				"customers": "Customers",
 				"home": "Home",
+				"invoices": "Invoices",
 				"jobs": "Jobs",
 				"owners": "Owners",
 				"schedule": "Schedule",