Add epanet input schema

sql/section_create/24.coordinates.sql

@@ -0,0 +1,10 @@
+-- [COORDINATES]
+
+CREATE TABLE COORDINATES
+(
+  Node VARCHAR(32) PRIMARY KEY REFERENCES _NODE(ID)
+, Coord POINT NOT NULL DEFAULT(POINT(0.0, 0.0))
+);
+
+CREATE INDEX COORDINATES_SPGIST ON COORDINATES USING SPGIST(Coord);
+CREATE INDEX COORDINATES_GIST ON COORDINATES USING GIST(Coord);