User cannot clone a license or use a template

[lordofscripts]

Say I have a license and want to issue it to a different user, other than creating a new one and manually entering all the key/value parameters by hand -which can be many!- there is no way to achieve this with the current UI. For example if you have an application with certain parameters, you would want to issue licenses to different end users.

An alternative (or perhaps extra feature) would be to allow the user of the tool to define License Templates that can be cloned for reissuing to various end-users.

[ayende]

A PR would probably be accepted