Mozdev project overview and secure installations

Mozdev's project overview pages are now live and feature secure installations using InstallTrigger.


Right now we don't have the download graph or the project stats in place, but the main functionality is there:

- Project name and description - Project tags - projects are tagged with supported applications automatically - Links to project tools - Project activity - Project extensions and downloads with InstallTrigger links

We're really excited to have this type of page in place that gives a nice overview of a project and available tools as well as providing everyone a way to install extensions securely.