Adding all files for Umbraco 6.2.4 installation and associated nuget packages.

Started replacing PropertyEditors from v7 with UserControls for v6.

New features:

- New action on DialogueCategoryController to show all categories in a list (more like a traditional forum)
- Added Last Post and Most active category to user profile page
- New action on DialoguePageController to show a user profile page.
- Added Reply action to all topics to create a static page for replies rather than the inline ajax reply method.
- Added LastPost, Number of views and Number of posts to Category class
- Added 2 new properties to DialogueSettings - Faq Url and Rules Url

I will endeavor to do smaller commits in future!