add Rails 4 to compatibilty in README
drop 1.8.7, ree and 1.9.2 from travis
minimum Ruby 1.9.3
no need to be strict on nokogiri version now that we're on 1.9.3 only
remove Rails 3.0 and 3.1 from Appraisals
require actionpack >= 3.2
drop 3.0 and 3.1 from .travis.yml
drop Rails 3.1 code path for CSS files in install generator
fix generator comment
rails 3.1 introduced button_tag, no need for work-around
Merge branch 'master' into drop-rails-30-and-31

Conflicts:
	gemfiles/rails_3.0.gemfile
	gemfiles/rails_3.1.gemfile
bump actionpack dependency to 3.2.13
Merge branch 'master' into require-ruby-193

Conflicts:
	README.textile
	formtastic.gemspec
Merge branch 'master' into drop-rails-30-and-31
remove unneccessary hidden input
deprecate rails < 4.0.4
remove deprecated date, time and datetime inputs
Merge pull request #1024 from justinfrench/deprecate-old-timeish-inputs

Remove deprecated date, time and datetime inputs
Merge pull request #949 from justinfrench/require-ruby-193

Require Ruby >= 1.9.3
Merge pull request #950 from justinfrench/drop-rails-30-and-31

Drop support for Rails < 3.2.13