added schedule and items commands

[stummjr]

The shub schedule and shub items commands were added. Here is how they work:

shub schedule

Schedule a spider for execution. Example:

$ #scheduling 'my_spider' for project 26736
$ shub schedule my_spider -p 26736

$ #scheduling 'my_spyder' for project defined in scrapy.cfg
$ shub schedule my_spider

$ #passing arguments to the spider
$ shub schedule my_spider -p 26736 -a arg1=foo arg2=bar

shub items

Fetch items from a given job. Example:

$ #getting the items scraped by job 26736/2/71
$ shub items 26736/2/71

[pablohoffman]

hubstorage should be a required dependency, and shipped with shub tool.

These commands should always work, not like deploy that requires scrapy to be present.

[bertinatto]

In Python 3 ConfigParser has been renamed to configparser.

[bertinatto]

I'd recommend using configparser from six.

[bertinatto]

When our dependencies add py3 support we might do the same for shub; so I think we should keep new code py3-compliant.

[josericardo]

+1 @bertinatto

[bertinatto]

Just a nitpick, but I think we should be consistent in the use of single or double quotes.

[stummjr]

👍

[eliasdorneles]

wow, that's a real nitpick. :D
I stopped worrying about single quotes vs double quotes when I stopped doing Perl and PHP. :)

[eliasdorneles]

Nice work, @stummjr !
I added a bit to the nitpicking, but this looks good, well done! :)

[josericardo]

Thanks @stummjr, well done indeed! ;D

[bertinatto]

+1

[stummjr]

Thank you guys for the help!