Previously when providing a project UUID while opening a document, and no project used this UUID, TextMate would create a new project (with this UUID).
This was both a way to force a file to open in its own project, and to open multiple files in the same project, even though they did not share project folder.
The problem is that `mate` will read the `TM_PROJECT_UUID` environment variable and use as target project, which is generally desired, but incase we launch a new application from TextMate, and this application later opens a file via `mate`, it will use the old `TM_PROJECT_UUID` value, which might no longer exist.
We still allow forcing files to open in their own project by introducing a special “null UUID”, but with this change, it is no longer possible to use multiple invocations of `mate` to open unrelated files in the same project. Should this be desired, we can re-introduce this feature but require that `mate` is given the UUID via its -p/--project argument.
Fixestextmate/latex.tmbundle#150
17ea3ec568