Bitrise export fix (#508)
Bitrise export fix (#508)

* `bitrise export` should display the help - completed

* Correction: Instead of “bitrise export -h”, directly cli.ShowAppHelp is called.

* Fatalf —> Fatal

* Correction: export command help is displayed instead of bitrise help

bitrise-io/bitrise-cli,bitrise-io/bitrise-cli,bitrise-io/bitrise,bitrise-io/bitrise