make backup executable
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Merge branch 'master' of github.com:sagemath/sagecell
Updates to deployment and management scripts
Merge branch 'master' of github.com:sagemath/sagecell