move save and auth buttons into editor header
indicate current user in auth dropdown
s/change book/change repository/
move some css around
Merge remote-tracking branch 'origin/master' into 57878432

Conflicts:
	styles/workspace/workspace.less
Merge remote-tracking branch 'origin/master' into 57878432

Conflicts:
	styles/workspace/workspace.less
move content-pannel height declaration into gh-book.less
Merge remote-tracking branch 'origin/master' into 57878432

Conflicts:
	scripts/gh-book/gh-book.less
Merge pull request #51 from oerpub/57878432

move auth and save buttons into editor panel header