tigefa4u projects Trac

Some reformatting in the attachment module.

Implement `AttachmentModule.resource_exists`.

This checks both for the existence of the attachment in the database and on the file system.

Implement `MilestoneModule.resource_exists`, with doctests.

Add `RepositoryManager.resource_exists`, which takes care of all the versioncontrol related resources.

Added tests for this and rework the setup and teardown code to retrieve the repositories from the !DbRepositoryProvider.

Add `TicketModule.resource_exists`, plus doctests.

Attachment module checks that the parent resource exists before allowing attachments.

Add `IResourceManager.resource_exists(resource)` and an implementation for the `WikiModule`, with doctests.

Fix `trac.test.EnvironmentStub` log handling following [9713]. Makes the test infrastructure work again.

l10n/pt_BR: some small messages (100%)

l10n/nl: Small translation improvement

Updated translation for 0.12RC1 by Bas van Oostveen and Laurens Holst