Support task streams #4
Description
Tasks streams differ from other stream types in that they are "sparse". They only contain files that were changed in the stream.
This is also how they appear in git, which is not correct - they should have all the files that existed in the parent at the branch point as well.
If you can give me a summary of the changes that would be required I can implement them. Its not immediately obvious to me how to go about this. It looks like P4Sync.importChange should call filelog on the parent stream with the changelist number of the branch point, but I am not certain.