Add Excel import
Merge branch 'master' of github.com:namely/ndc
 Naive FIx of Excel encoding
First version of Image zipfile cleaning.
THis commit adds the following:
Allows upload of a compressed file
Opens the zip file
Analyzes the files inside the zip file
select the ones that match with the csv file
For each matched file, clean the name (removing
non alphanumericals, and ading the jpg extension)
compresses the images and sends back the zipfile
Fix Image errors output
Merge branch 'master' of github.com:namely/ndc