Env variables in config file get substituted
Add verbose flag
Adding support to media upload sync (BROKEN)
Uploads a new version only if a file has changed
Several sync fixes; don't upload empty files
Code refactoring
bugfix: use supplied db name instead of constant
Working dry run mode
Looks for a database section (instead of mongodb)
cli: better error handling
Increase resource list max limit to 256
Godoc fix
Add support for keeping files (regexp match)

By defining a keepfiles regexp entry in the cloudinary section
of the config file, remotes resource matches won't be deleted by
the -rm* commands.

This can be useful to ensure some crucial user-uploaded resources
are not deleted by the tool.
Handles mongoURI env var substitution properly
Absolute path fix
Update non-verbose input for uploads

In non-verbose mode (the default), file uploads will show a
sequence of ........U...U......

'.' (dot) is for unchanged files, U stands for "upload a new
version of a file".
Update service and main to returns the public_id
Needed for bf