Fixes error 166 from flickr.
Persist successful uploads to disk immediately

When uploading a large number of files (and fully expecting this process to die/fail before it finishes uploading all of them), it can be frustrating that the list of successfully uploaded files is stored only in an in-memory shelf object and is persisted only after an attempt to upload every file, in the call to self.uploaded.close().

This diff adds a call to self.uploaded.sync() on every logUpload(), which makes it much faster to fix in tangible form a copy of the fact that a file was uploaded successfully.
Add option to search flickr for filename title before upload to help avoid duplicates
Merge branch 'christobal/patch-1'
Merge branch 'github.com/master'
Merge branch 'spitimage/searchfirst'