* Update README.md with better project description

README.md

-# ansible-poudriere
-Ansible playbook for creating FreeBSD Ports Tree test environment using Poudriere
+ansible-poudriere
+=================
+
+**Automate building FreeBSD Poudriere environment**
+
+This is Ansible playbook for automating creation of FreeBSD Ports Tree test and packages build environment using Poudriere ('ports-mgmt/poudriere' in FreeBSD's ports).