tashi-client: leave ValueErrors which came from incorrect operations, while converting ones originating from a failure to perform a proper operation to TashiError tashi-client: Don't tell the user about an "exception"; offer help if a ValueError occurred.
tashi-client: leave ValueErrors which came from incorrect operations, while converting ones originating from a failure to perform a proper operation to TashiError
tashi-client: Don't tell the user about an "exception"; offer help if a ValueError occurred.

git-svn-id: bf82309ee31681273af20a825c7064ea7c5af838@1359990 13f79535-47bb-0310-9956-ffa450edef68

stroucki/tashi,stroucki/tashi,stroucki/tashi