An example for the issue #71
Merge pull request #80 from Koloto/master

An example for the issue #71 (to 'tabbable' branch)
keyboard navigation (issue #71): support nested input elements, introduced 'tabbable: "nodes"' mode
Merge pull request #85 from Koloto/master

keyboard navigation (issue #71)
tabbable nodes: fix of the focus frame around expanded node
Merge pull request #86 from Koloto/master

tabbable nodes (issue #71): fix of the focus frame around expanded node
Merge branch 'master' into tabbable