Fix issue 1 - spaces in filenames cause problems

This fixes issues that caused the process to break when working with spaces in filenames.

• add quotations in s3 shell command
• remove space from transcribe job name

create_captions.sh

@@ -14,5 +14,5 @@ python /convert_all_json_to_vtt.py /incoming_mp4
 # the bucket. Leave them in the local directory.  
 for file in *.mp4
 do
-    aws s3 rm s3://vtwxvideocaptionuploads/$file
+    aws s3 rm "s3://vtwxvideocaptionuploads/$file"
 done