Issue 002: Add initial templates for dita topics and maps

These initial templates make it easier when creating new content for
dita topics and dita maps.

Templates created for:
- concept topic
- reference topic
- task topic
- glossary entries
- map file
- keydef map files for content and graphics
- system preference reference topic.

Each template includes:
- copyright, contributor and source of content information in a comment
- title, shortdesc and prolog tags
- tags appropriate for the topic type or map.