fix options - auto-content-type

Hello :)

It seems not all the options were swapped from "no-content-type" to "auto-content-type", and, should no content type be given, results in an error:

Traceback (most recent call last):
  File "/usr/local/bin/file-syncer", line 10, in <module>
    execfile(__file__)
  File "/var/www/vhosts/latina.com/docroot/src/file-syncer/bin/file-syncer", line 4, in <module>
    run()
  File "/var/www/vhosts/latina.com/docroot/src/file-syncer/file_syncer/run.py", line 120, in run
    no_content_type=options.no_content_type,
AttributeError: Values instance has no attribute 'no_content_type'
Exception KeyError: KeyError(140361824529776,) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored

  Thanks!
Oops! I did not mean to attach those 3 "preserve file path" commits. Was attempting to get this tool to preserve the directory name. Ended up writing a tool specifically for my task: https://github.com/erulabs/cloudsink

Sorry about that! I can close this PR and reissue one for the "no_content_type" commit if you'd like :)