Update README.md

Author: kmacmcfarlane

README.md

@@ -1,2 +1,15 @@
 # csv-2-postgresql-go
-A Go application that reads an arbitrary csv, determines it's schema, and loads it into a target PostgreSQL database.
+A Go application that reads an arbitrary csv, determines it's schema, and loads it into a target PostgreSQL database. It supports SMALLINT, INTEGER, BIGINT, FLOAT, DOUBLE, BOOL, and TEXT datatypes.
+
+# Building and Testing
+
+`make` - Download project dependencies, build, and run tests
+`make test` - Run tests
+`make test_watch` - Run tests in watch mode
+
+# Usage
+
+To use the application, first build with `make`, then execute the application providing as arguments the name of the csv file and the postgresql connection string to store data in.
+
+`make`
+`./bin/csv-2-postgresql test2.csv postgres://postgres:hello@localhost/test?sslmode=disable`