Version bump to 0.16.0.pre
Updated to jbuilder 1.3.0
Updated to pg 0.15.1
Refactored design controller and model

Removed design exports from designs index
Removed code for original design reports
Removed code for original project reports
Removed multi-page designs
Major refactoring to get better overview of labeled and raw responses
More refactoring for grids and sheet_variables
Updated deprecated code
Refactored valuable concern
Added tests to cover sheet_variable grid updating
Fixed some instances of grids with files not displaying properly
Refactoring response_file and response_file_url to the sheet level
Refactored response_name to sheet_level
Finished refactoring/removing response_name()
Moved response_with_add_on to valuable concern
Moved update_responses! to valuable concern
Expanded grid to cover integer, calculated, and numeric values
Fixed typo
Updated grid response variable