add create new bookshelf
update octokit
Merge remote-tracking branch 'origin/master' into 61951442-create-new-bookshelf

Conflicts:
	bower.json
use octokit's createBranch instead of createRef
integrate 'create new bookshelf' with change bookshelf modal
Merge remote-tracking branch 'origin/master' into 61951442-create-new-bookshelf
fix typo in create bookshelf
copy change in change bookshelf modal
add confirmation if changing bookshelf with unsaved changes
Merge pull request #148 from oerpub/61951442-create-new-bookshelf

create new bookshelf