repository connector for large repositories

[Jeff Hammel]

Ideally, a new repository would be created for each new trac project. However, in many situations this is impractical or organizations have committed to large monolithic repositories. See for example ​https://svn.openplans.org/svn . For this case, a repository connector could be made for said repositories that takes additional action over ExistingSVN​:

• a new directory should be made with the project name. Maybe a default structure could be set via a template

• [mainnav] browser.href should be set to point to this location