Removed possible double hiding in tree.
Added option not to hide removed node(s) for tree nodes.
Extended {hide: false} option to work with binary trees.
Added 'own' child function for binary nodes.
Merge branch 'master' of https://github.com/vkaravir/JSAV into removeoptions
Old root and _edgetoparent of new root are now hidden by default.
Put {hide: false} option to the doc
Fixed bug with hiding old root.
Merge pull request #110 from X455u/hideoptions

Hide options for removed/replaced nodes