when branch file names are not absolute and not an URL and the tree file name is absolute or an URL then make the branch files relative to the path of the tree file. In this case one can move the tree + all branch files to a different location in the file system and still access the branch files.
when branch file names are not absolute and not an URL and the tree file
name is absolute or an URL then make the branch files relative to the path
of the tree file. In this case one can move the tree + all branch files to
a different location in the file system and still access the branch files.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@3064 27541ba8-7e3a-0410-8455-c3a389f83636

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