bug 839214 - elasticutils and search mapping

add elasticsearch-head plugin

simple cron to reindex documents

update vendor submodule for elasticutils
fix bug 844321 - Allow PSDs
fix bug 844531 - Add more Gaia CSS and art resources to Kuma media directory
Merge pull request #887 from darkwing/psds-844321

fix bug 844321 - Allow PSDs
Merge pull request #888 from lmorchard/844531-add-more-gaia-css

fix bug 844531 - Add more Gaia CSS and art resources to Kuma
bug 818580 - changes in wiki editor js and adding class to need review section

bug 818580 -  The editor is under text element at the page's bottom
bug 818212 - Upload img and add css styles for p2pu logo
Merge pull request #890 from tx2z/bug-818212

bug 818212 - Upload img and add css styles for p2pu logo
Merge pull request #889 from tx2z/bug-818580

bug 818580
Merge pull request #881 from groovecoder/document-index-794525

bug 839214 - elasticutils and search mapping