Add a license template setting to project settings

A license template can currently only be set globally, and is then applied to all projects. This is not practical when working on projects from different sources, each with their own license. For example, I use the GPLv3 license for my own open source project, but I have also done some work on another project that uses the LGPL license.

Suggestion: add a license template setting to the project-specific settings. This setting can inherit or override the global setting. Override could mean:

• a different template
• global template is not set, but a project-specific one is
• a global template is present, but the project specifies to not use a license template