Removed unused files
Removed adding files to versions and projects
and the associated activities
Removed files module and its permissions
Removed routes and routing spec
Removed test data
Removed non-functional tests
Fixed test relying on attaching files to projects
Added migration to warn on existing files attached to projects and versions
Updated changelog and simplified migration
Merge pull request #310 from opf/feature/rails3_remove_files

Feature/rails3 remove files