PA-444 median applications per week

The calculation for median applications per week now excludes weeks
where there were zero applications. I understand that this will make
calculations slightly wrong for councils who tend to have more genuine
weeks with zero applications, but the tradeoff is with the inevitable
scrapers that fail for long periods at a time now returning numbers
other than 0.
Merge remote-tracking branch 'pserwylo/master'
Added small explanatory text for new calculation of media applications
Removed webrat gem by replacing webrat matchers
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Replace cucumber with direct use of capybara api
Complete remove cucumber from project
Merge branch 'master' into rails-3.1

Conflicts:
	.gitignore
	Gemfile.lock
	features/support/env.rb
	lib/tasks/cucumber.rake
	spec/spec_helper.rb
We can't use capybara 2 with ruby 1.8.7