Adds comments to the example config file.
Fixes a bug in the Base::populateTimeLogFromPostData()

If a user posted another tag alongside a meta tags things would not get translated correctly.
By iterating over each posted field individually to see if we are dealing with a plain tag or a meta tag and acting accordingly, things are now handled as they should be.

This allows for other tags (like comment or group tags) to be added to meta tag for inclusion for persistence.
Fixes a bug caused by inadvertent multiple inheritance attempt in the Base code.

 - Also adds some comments and TODOs.
Improvements to the History functionality.

 - Cleans up the history overview code.
 - Puts HTML representation into a separate template.