Add multiple currencies to the Total invoice tabulator

Author: pjkundert

GNUmakefile

@@ -77,7 +77,7 @@ test:
 	$(PY3TEST)
 
 analyze:
-	flake8 -j 1 --max-line-length=200 \
+	flake8 -j 1 --max-line-length=250 \
 	  --ignore=W503,E201,E202,E127,E221,E223,E226,E231,E241,E242,E251,E265,E272,E274 \
 	  slip39