Ref. 454 - Fixes migration.
Merge pull request #455 from NUBIC/454-down-migration-drops-surveys-table

Fixes survey_translations down migration. Closes #454
attempt at quelling intermittent 'SQLite3 Exception: SQL logic error or missing database' errors on CI
Update kitchen_sink_survey.rb
Demonstrate invalid #to_formatted_s assumptions.  #459.
Make #to_formatted_s handle nils in datetime_value.  #459.
Update changelog.  #459.
Merge pull request #459 from NUBIC/459-handle-nil-dt

ResponseMethods#to_formatted_s incorrectly assumes non-nil datetime_value
Attempted fix for overzealous refactoring.

a37c4e1d99ce7fda39bf292584730ae6af640915 factored out

    read_attribute(:datetime_value)

to #datetime_value.  Unfortunately, this shadows ActiveRecord's
definition of #datetime_value (which is auto-generated).  Hypothesis:
this is causing things like timezone conversion to be eliminated from
the attribute reader.
Update to support rails 3.0+
Update formtastic
dropping 1.8.7 support
updated to latest factory girl. rspec executing but failing
some rspec tests now working
minor changes
only four failing tests.. woot
all working
Merge branch 'feature/rails_4' into develop
merged
updated README