Much improved ScraperWiki Ruby gem

[Francis Irving]

The ScraperWiki Ruby gem now has a lot more of the compatibility
functions - for executing queries, and saving and loading variables.

Thanks Shyam for the patches!

You can get it with "gem install scraperwiki"

The code and documentation are here:
https://github.com/scraperwiki/scraperwiki-ruby

This should make it easy for you to run ScraperWiki scrapers on your
laptop or on other servers.

It's also the same gem that is used on the new ScraperWiki platform
for backwards compatibility. There's no longer anything
platform-special about it - it is just a gem that can make an SQLite
database.

Please report bugs and/or send pull requests.

Francis