Made it possible to cancel the adding of a service
Safe calculating of total size (catching possible exceptions from getsize)
Accept filenames with spaces
Merge pull request #11 from monsta/cancel-adding-service

Made it possible to cancel the adding of a service
Merge pull request #13 from monsta/accept-filenames-with-spaces

Accept filenames with spaces
Merge pull request #12 from monsta/safe-getsize

Safe calculating of total size (catching possible exceptions from getsiz...