Converted the generators to Thor

I converted the generators to thor and opened up the possibility of setting config options directly from the generate command. Change the default driver browser combination to watir-webdriver/firefox. 

Other generators added to create a single functional or integration spec not tied to a page and a model generator to generate sequel (sequel.rubyforge.org) models. 

Made changes to the runtime dependencies rake and rspec are at the latest versions. Also changed watir-webdriver and selenium to development dependencies. Made this change so that if a user will only need to install the gems for the drivers that they need. Plan to on the next push add the gems to the gemfile based on their driver choice.  

Made changes to the default rake task created, so that the extra artifacts folder doesn't happen and made the --pattern option more generic so that running spec:integration will work.