ENH: Add support error message

Granted that qcli is updated to version 0.1.1, error messages in QIIME
will no longer print the script usage text (also known as the wall of
text), instead only the error message and a small string with a URL
where users can find support will be printed, see this example:

(qiime-dev)yoshikivazquezbaeza:qiime@extra-help$ print_qiime_config.py --does-not-exist
Error in print_qiime_config.py: no such option: --does-not-exit

If you need help with QIIME, see:
http://help.qiime.org

Note that we don't "have" to update setup.py to require qcli==0.1.1,
because 0.1.0 will work just fine, the only problem is that the wall of
text will continue to be printed.

For more info see this PR:
https://github.com/biocore/pyqi/pull/265