Simple SQL Client in KnoxShell for access to JDBC datasources

Let's take the following wiki article example and make it an actual feature of KnoxShell: https://cwiki.apache.org/confluence/display/KNOX/SQL+Client+Example+using+KnoxShell+in+Apache+Knox

In order to make it a generic feature, we will need to do a number of things:

1. add a lib directory
2. add the HiveDriver - maybe - perhaps it is better to have the user download the right version?
3. add commons-logging jar to lib directory
4. add a real table rendering class to the KnoxShell rather than embedded in the SQL client script - so that other features and scripts can use it to render results
5. add the knoxline.sh and hive2.groovy script to bin directory