Projects, snapshots, SVN, requirementHooks, multiple subfolders

Second version of the ToolboxToolbox!

New features include:

• support for projects in addition to toolboxes
• support for version-pinned snapshot configurations
• support for Subversion
• toolbox requirementHooks to check things like native dependencies
• support for adding multiple toolbox subfolders to the Matlab path.

Also various bug fixes and refactoring.

Milestone issues here.

First useful version.

This is the first version of ToolboxToolbox that was used by a several people, and seemed to be useful!

It represents the initial implementation, plus some informal feature work and bug fixes.