Merge pull request #88 from jeroencoumans/master

Label should be rendered before input
Take extra care when accessing `props.children`

Deprecate `utils.modifyChildren` and `utils.filterChildren` in favour
of new `ValidComponentChildren` functions, these functions wrap the
`React.Children` implementation which is unsurprisingly more robust
and covers more edge cases, with an added check to make sure it only
operates on "valid components".
Merge pull request #90 from pieterv/safer-children-access

Take extra care when accessing `props.children`
Fix collapsable `Nav`
Ensure compatability with React master
Move source repo to organisation
Merge pull request #97 from react-bootstrap/chore/move-to-org

Move source repo to organisation
Fix TravisCI status badge
Refine authors
Forgot to push v0.10.2

Let's hope nobody notices :)