v0.11.2

* Improve the update experience by showing a download progress indicator
* Fix issue on Windows OS where the JAR version file handle was not closed
  and caused permissions access problems to the file in subsequent attempts
  to open the file
* Add support for other/alternative backends using the -e / --endpoint
  option. The backend can be also saved on the configuration file of use
  via the 'td server:endpoint' or when running 'td -e <newendpoint> account'
  command. The TD_API_SERVER environment variable still takes precendence
  over all these settings
* Removed Treasure Data Result Output database and table name client side
  validation since it's performed in the API backend
* Suppress stack traces for APIError exceptions from the client library
* Changed the default HTTP port from 80 to 443 when interacting with the API
  server to support SSL
* Support working entirely without a configuration file (hence without
  having to run 'td account' prior to using the CLI) by passing the -k option
  on the command line
* don't wipe out the current JAR file if an attempt to retrieve the most updated
  JAR file failed because of network connectivity problems
* Show the job result only for finished jobs: unfinished jobs don't have any
  result to display anyway)
* Honor the HTTP_PROXY setting also when updating the JAR file or the Toolbelt
  itself
* Fix parsing of the HTTP_PROXY variable for the Bulk Loader's usage
* Allow optionally disabling the JAR file auto-update feature by setting the
  TD_TOOLBELT_JAR_UPDATE environment variable to 0