Update .travis.yml
Fixed Frontiers citation
Update indexsidebar.html
Merge pull request #744 from apdavison/patch-1

Fixed Frontiers citation
make DataGrabber and SelectFiles use human order
Fixed a copy/paste error.
Added tests.
Merge pull request #745 from chrisfilo/enh/human_order_datagrabber

make DataGrabber and SelectFiles use human order
Merge branch 'master' into fix/sparse_matrix

* master:
  Added tests.
  Fixed a copy/paste error.
  make DataGrabber and SelectFiles use human order
  Update indexsidebar.html
  Fixed Frontiers citation
  Update .travis.yml