Added more information to README.md

README.md

@@ -1,3 +1,18 @@
 Libreternity
 ============
 A 3D federated MMORPG.
+
+Building
+--------
+This project is built using the `premake4` system. Run the following to compile with [GNU Make](https://www.gnu.org/software/make/):
+
+```
+$ premake4 gmake
+$ make
+```
+
+Use `make help` to list additional options.
+
+Licensing
+---------
+This project is licensed under the terms of the [GNU Affero General Public License version 3 or greater](/LICENSE).