updated the batch upload form to accept xlsx files

fixes SPOT-633

xlrd was updated to read xlsx files on top of just xls files
yay!
Merge branch 'spot633'
Added License notice to base template file.
Merge branch 'craig'
no longer aborts the entire upload process if one put fails

fixes SPOT-634
Merge branch 'master' of git://github.com/samolds/spacescout_admin into samolds
SPOT-711: Fixed problem with hours on upload/download (for saturday, app dls as 'sa' and for upload expects 's').  Now consistently 's'
Merge branch 'master' of git://github.com/swansong/spotseeker-admin into jswan2
on batch spot PUTs, spot images are no longer touched (POSTed)

fixes SPOT-621
Merge branch 'spot621'
Merge remote-tracking branch 'upstream/master'