Dropbox::API::Error subclasses StandardError rather than Exception. Specific errors inherits from inherits Dropbox::API::Error so that you could catch any kind of dropbox related errors.
Merge pull request #29 from kenn/standard_error

Better error classes
0.4.0 - proper error classes

I'm updating the minor version, because this is breaking
backwards compatibility.
Merge remote-tracking branch 'upstream/master'