Merge pull request #16 from frederickk/master

b.group(), b.ungroup() and group-tests.jsx
bugfix, removed redundant pub.selections()

for some reason the function was implemented two times
refactoring … moving labels() and selections() to the right place
added hint in group() example
added b.group() and b.ungroup() to changelog
Merge remote-tracking branch 'upstream/master'
updating remote
updating remote