Document supported database and drivers version

.gitignore

@@ -13,3 +13,4 @@ MANIFEST
 htmlcov/*
 .ropeproject*
 secret.txt
+.tox

docs/source/install.rst

@@ -47,3 +47,12 @@ like to change your default Python interpreter to Python 3 serious, it is recomm
 that you export your database and re-import it to a new database created using Python 
 3.X . 
 
+Database versions 
+----------------- 
+
+The current version of Pwman3 is tested with Postgresql-9.3, MySQL-5.5 and SQLite3. 
+
+The required python drivers are:
+ 
+ * pymysql  version 0.6.6 
+ * psycopg2 version 2.6