Merge pull request #2 from lexoyo/master

work in progress
Merge pull request #3 from lexoyo/master

fixed a crash when an error occured in gdrive
Merge pull request #4 from lexoyo/master

multiple file upload with get command for dropbox
Merge branch 'master' of https://github.com/silexlabs/unifile
fixed multiple files upload (name of files was wrong)