Removed refernence to old carrierwave location
Removed unused `remove_file` JS partials
Removed duplicatation in `SheetVariable` model, and moved heavy lifting to the `Valuable` concern as initially intended
Changed target to 0.24.4.pre
Simplified setting slug in design model
Added tests for setting design survey slug
Removed redundant `response_file` and `response_file_url` methods from `Design` model
Fixed version of `minitest-reporters` to `1.0.2` due to incompatibility of `1.0.3` with `simplecov` coverage report
Removed `response`, `position`, and `sheet_variable` local variables from `sheet_variable` show partials, closes #129.
Moved common parse date and parse time code to a library module `DateAndTimeParser`
Added tests for importing a design from JSON format, closes #127.
Separated test changes and refactoring in changelog
Added missing test support file
Added tests for updating domains and variables when editing the design
Refactored variable types into separate classes
Updated to minitest-reporters 1.0.4
Fixed a bug that kept sections from being changed to subsections on the design editor
Fixed a bug that kept sections from being changed to subsections on the design editor
Printed PDFs have better styling for sections and subsections, closes #131.
Moved project name to top center of PDF, closes #132.